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How is testicle itching? Sometimes it will shed hair.
Pubic hair is one of the special hairs of human body. Because it grew in people's private parts, it was cloaked in mystery, and people also remembered or mentioned it with strange feelings. Many scholars use evolution theory to explain pubic hair. I think this is the result of hormones. Where vitality is strong, there are many sex hormones and body hair is correspondingly long. Scarcity of pubic hair is very easy to cause psychological problems. Some men have very little pubic hair, which not only makes them feel embarrassed, but also makes them reluctant to go to public bathrooms or swimming pools. They will also have various concerns, entertain foolish ideas and even blindly feel inferior. For teenagers, there is no need to panic about the scarcity of pubic hair. There are many forms of human secondary sexual characteristics, and the time and order of their appearance are inevitably different. There is only a lack of self-confidence and unnecessary worry. They don't distinguish between normal variation and pathological manifestations, and think that other people's sex organs are bigger than their own (but there is an illusion of perspective here), their beards are thicker than their own, and their pubic hair is denser than their own, and so on. Only a few belong to pathological state. The problems reflected by these secondary sexual characteristics are sometimes important indications of endocrine system or genetic diseases, which should not be taken lightly. Pubic hair is one of the secondary sexual characteristics, and the growth of pubic hair is the result of androgen stimulating pubic hair growth receptor. After puberty, men's pubic hair not only increases gradually, but also presents a typical rhombic distribution of men, while the growth of women's pubic hair is the result of estrogen stimulation, so the distribution of women's pubic hair presents an inverted triangle with a flat upper edge, which is completely different from that of men. The growth of body hair of girls varies greatly among individuals, so even if pubic hair is rare or absent, it is mostly physiological, and the absence of pubic hair does not necessarily hinder development. However, if a man has no pubic hair, he is likely to have stunted growth, especially if he is over 17 or 18 years old and has no pubic hair, so it is necessary to investigate carefully. The key is to see if there is any abnormality in testicular size, penis size, beard, Adam's apple and tone. In other words, pubic hair deficiency is not an isolated problem, but one of a series of symptoms. If there are many other abnormal manifestations, it may mean that there is something wrong with the endocrine system or chromosomes. But if there is no other indication, it is likely that there is something wrong with the receptor. When the growth receptor of pubic hair is defective, pubic hair is sparse and soft, but when the growth receptor lacks androgen or is insensitive to androgen, pubic hair does not grow. At this time, it is likely to be accompanied by rare body hair such as armpit hair, or it may have a family history. This simple abnormal growth of body hair has no effect on overall health and reproductive health, but is a physiological variation, so there is no need to worry at all. People's worries are often influenced by some folk superstitions and legends. For example, some people call a woman without pubic hair a "white tiger" and a man without pubic hair a "dragon", which is considered ominous. "A woman loses for her husband and a man loses for his wife". These superstitions obviously lack scientific basis, and people with sparse pubic hair should be treated differently. As long as there are no other problems, there is no need to worry. References:

When the reproductive organs gradually mature, pubic hair begins to grow near the external genitals. Some girls will be disgusted with pubic hair and even feel ashamed. In fact, this part is called "shame department" because it is ashamed to show people, and everyone has it. What's the shame? Europeans and Americans call this film "Venus Mountain", which sounds wonderful. Pubic hair is not useless, but grows to protect our bodies. Pubic hair can absorb sweat and mucus secreted by these parts and spread around, which is good for health. In sexual life, you can also increase the pleasure caused by external genital friction. What is the normal age of pubic hair? Women's pubic hair is located in pubic symphysis, with an inverted triangle distribution. About from 10- 13 years old, the vulva pubic hair is few and soft, and then the number gradually increases and the color gradually deepens. Some people grow pubic hair after menstrual cramps (or 18 years old). According to foreign reports, the average age of female pubic hair is11.0-1.35 years old, which is earlier than that in China. Whether pubic hair affects sexual life is one of the second sexual characteristics of human body. Generally speaking, girls 1 1- 12 years old, boys 14- 15 years old, pubic hair began to appear. If the pubic hair is not long or sparse at this time, it is medically called hairless. Women suffering from hairlessness are commonly known as "white tigers" and men suffering from hairlessness are commonly known as "Qinglong". In the old society, there was a saying that "the dragon and the white tiger were unlucky" and "the man suffered a bitter wife and the woman suffered a bitter husband". , is pure nonsense. The mental pressure on patients is great, and some people even dare not fall in love. Generally speaking, after puberty, pubic hair grows in its pubic hair follicle due to the action of androgen. Male androgen is secreted by testis, while female androgen is also secreted by adrenal cortex and ovarian stroma. Whether male or female, the presence or density of pubic hair is related to the androgen level in the body and the sensitivity of pubic hair follicles to androgen. Those who simply have no pubic hair and are otherwise normal may be caused by the insensitivity of pubic hair follicles to their own androgens. This is not morbid, and it has nothing to do with it. It will neither affect their health nor their marriage and childbearing, so there is no need to worry about it, let alone believe those nonsense. Of course, very few people may also be caused by diseases, such as hypothyroidism and sparse pubic hair. Another example is inflammation, tumor or trauma, which destroys the structure of hypothalamus-pituitary-adrenal axis and affects the secretion of sex hormones. Or because of congenital diseases or some unknown diseases, such as idiopathic Addison's disease, affect the secretion of sex hormones, such as menstrual disorder, amenorrhea, sparse pubic hair, sexual dysfunction and so on. For another example, under the influence of drugs, glucocorticoids are used in large quantities for a long time before puberty, which inhibits the function of hypothalamus-pituitary-adrenal axis in a feedback way, leading to the decline or even atrophy of renal cortex function, and the decrease or no secretion of androgen, which will lead to sparse or no secretion of pubic hair. Pubic hair is sparse or not long, and most people belong to the type of poor local sensitivity. If it is caused by a disease, pubic hair will grow back after the illness, which will not affect marriage and sexual life after marriage. Have you ever tried stroking a woman's pubic hair? Finger technology includes direct stimulation of sexy finger technology. Especially from psychological stimulation. Can improve the sexiness of women at once; The best way is to rub on pubic hair. Pubic hair is the worst part of a woman's body. According to the data, most women are very concerned about the length and thickness of pubic hair. Under this psychological effect, the fingering of pubic hair arouses women's sense of shame, and then it turns into a strong sexual impulse, which makes women crazy. This is the most common finger technique. During sexual intercourse, when the penis rotates slowly in the female reproductive organs, if the man is in a normal position on the bed and his body is slightly raised, the fingertips of two or three fingers are repeatedly inserted into the pubic hair for combing. Whether rubbing with your fingertips or rubbing with your back, even fiddling with your hands, or playing around with your fingers, or combing carefully one by one, using your hands as a comb and combing carefully and slowly, are the key points of this technique. Of course, positions other than the normal position can also be performed. When a woman makes a promise, touching her pubic hair one by one will only arouse her stronger sense of shame. At the same time, I feel that my pubic hair is loved by men one by one, and my psychological pleasure is self-evident, which in turn stimulates strong sexual excitement. Compared with men, women feel more strongly about sexual intercourse. So they are often controlled by emotions and care whether they are loved or not. Only by understanding women's psychology can we give women real happiness, not only physically but also mentally, and women will become "it doesn't matter if they are chaotic again" and "do whatever they want" ... In addition to this finger skill, we can also add a finger skill at the same time; That is to say, at the same time, finger a woman's hair and touch it one by one. Hair is also one of the psychological sensitive areas of women. If you can touch your pubic hair at the same time, your sexual excitement will be further improved. In addition, you can lick a woman's earlobe to her neck with your tongue. At this time, the movement of penis is based on the principle of slow and anxious rotary movement. This technique can be used not only in sexual intercourse but also in foreplay. This aroused women's sense of shame and disturbed her psychology. Sexual knowledge: Is pubic hair related to sexual desire? Source: 5 1FAN. COM was published at: 2001-014 23:13: 41page views: 684 Q: Girlfriends have few pubic hair. Is there a relationship between female pubic hair and sexual desire? More sexual desire or less sexual desire? Dr. Lin answered: the number of pubic hair is related to the following factors: people with high androgen levels in the body have heavier pubic hair (the hair on the body and lips is also heavier); Genetic influence, parents' body hair weight and children's body hair weight are all possible; Hair follicle development in the skin. If the relationship with sexual desire is a folk saying, there is no scientific basis yet. No pubic hair or excessive pubic hair is a kind of human hair, which has the function of preventing friction and is also one of the factors that constitute human beauty. In ancient times, the west advocated the beauty of human nudity. At that time, pubic hair plastic surgery already existed, and it was very popular, and it was gradually accepted by orientals. Pubic hair reconstruction often depends on plastic surgery hair transplantation, that is, using a special hair transplantation tool to transplant part of scalp hair to pubic region. The operation can be performed under local anesthesia. If one planting is not enough, you can plant it again in a few weeks, and generally you can get good results. For those with excessive and dense pubic hair, a non-invasive depilatory can be scraped or applied regularly. The pleasure of shaving pubic hair and Ann's recommendation of shaving pubic hair can give you great pleasure. Although it is sometimes overlooked, please believe that it is only because the growth rate of your hair can't keep up with the needs of doing it all the time. Still, it's interesting if you do it once in a while. I wrote this essay at the request of a netizen. You can be happy by referring to my practice. Of course, you might as well make some adjustments appropriately. Well, first of all, I want to tell you that if you have never done this before, you will feel extremely comfortable after trying it. I like people scraping my vagina. I think the matter itself is very erotic, and I like the final result. If your private hair is really thick and long, it is recommended to cut it short with an electric beard trimmer first. If it doesn't work, use scissors. It will be much more convenient to use a razor in the future. Now you have several options. The simplest thing is to take a bath to soften your pubic hair, which makes it easier to shave. If you can't take a bath for a while, put a hot wet towel (preferably thick and soft) on your vagina for a while. Ladies, when the heat of the towel penetrates into your skin, you will feel the incredible feeling that this method gives you. I also want to remind everyone that you'd better lie flat on the bed or floor, so that you and your partner are in an ideal position. Try to lie flat and relax. For the convenience of your partner, try to keep your legs apart. Ok, back to the topic, after your private parts are wet with towels, you should use shaving cream. When choosing shaving cream or soft gel, read the instructions carefully. If your skin is sensitive, please use a brand specifically for this kind of skin. There is really no need to spoil everyone's fun because of this problem. Maybe it's time for the boys to look down. Please remember to cover all the places you want to shave later with shaving cream. You must know what it's like to shave. Of course, it's interesting to shave off the pubic hair of a female companion. Let's add some fun to Doby's female companion. But be careful not to get shaving cream in unnecessary places like labia. I accidentally touched it and it hurt a little. Please remember to use a new razor! It would be better if you prepared several at the same time. There is nothing worse than scraping the vulva with a blunt knife. Gentlemen, think about whether you would like to shave with a razor that has shaved a woman's vagina. Nothing interesting, is it? Let this interesting thing begin! Ladies, you need to relax and try to stay still, otherwise sudden movements can easily hurt yourself, and leaving scars there should not be considered sexy. Gentlemen, your's job is actually not difficult, as long as you take good care of your beard. It's best to put a glass of water beside you and soak the razor after shaving every time. Of course, you should pay more attention to those difficult places, such as bikini line, the bottom of vulva, and sometimes even the inside of labia majora, which also depends on the shape of your female partner's vulva. You know, every woman's vulva is different. After shaving, you should clean the whole vulva with a hot towel. So you can see if there is anything missing, if everything goes well, or if it can be redecorated. Ladies, now you should wash it with soap and water every day to prevent the accumulation of sweat and grease. The first shaved part may develop urticaria (that is, rash). Never mind, it will fade in a few days. As long as you shave regularly, this phenomenon will gradually disappear. At first, I suggested that you shave your pubic hair every three or four days, so that there won't be too much hair to deal with every time. It itches a little every time it grows to a certain length. I take this as a signal that they are going to shave their pubic hair again. If your skin is not suitable for shaving more, then reduce the frequency. I like my partner to shave my vagina. Every time I shave, I always feel particularly sexual. I also like the feeling of smooth vulva. I remember that after shaving for the first time, I couldn't help myself. My hand has been stroking there, and I often even rub there unconsciously through my clothes. I also found that shaving the vulva can bring more excitement during sex. It increases the pleasure of sexual intercourse because you can clearly feel your partner's skin close to your vulva. So I will never let my pubic hair grow any longer after that. I hope the above information can help you and make your shaving an erotic and interesting experience. If you have any special experience or suggestions, you might as well communicate with us. There is a great difference between male and female individuals in pubic hair quantity and normal pubic hair quantity-normal female body hair is less than male. Female pubic hair generally appears in the early stage of breast development, first at the labia majora, and then develops to the pubic mound triangle, and its pubic hair distribution is inverted triangle. Axillary hair grows after pubic hair appears and before menarche. If there is a discrepancy, it doesn't mean there is a problem. Too little or too much pubic hair is mainly manifested in women. Normal women have little body hair, most of which are physiological, and have no important pathological changes, which have no impact on health and are generally not considered pathological. Little hair syndrome is a pathological state of a few women. There is a genetic disease caused by sex chromosome abnormality, called Nessler's syndrome. The female patient's gonadal insufficiency is characterized by short stature, breast dysplasia, infantility of vulva and genitalia, almost complete light on pubic mound, often accompanied by amenorrhea and infertility. Some women have low thyroid function, often no armpit hair, less pubic hair and low sexual desire. Some women have postpartum hemorrhage, pituitary ischemia, pituitary insufficiency, amenorrhea infertility, emaciation, weakness, decreased sexual desire, hair and pubic hair loss, and love on the pubic mound gradually becomes less hairy. The above-mentioned hairless or hairless due to pathological changes should immediately go to the hospital gynecology and laboratory for examination and symptomatic treatment. Some young men also have little or no pubic hair, often no Adam's apple, high tone, narrow household and no sperm in semen, which is caused by congenital testicular hypoplasia or small testicular disease. This pathological condition of men must go to the hospital for chromosome examination and treatment. Because it's more complicated. Women with eosinophilic or basophilic pituitary adenomas usually have hairy genitals. The former finger sausage-like, gum thickening, tongue enlargement, gonadal dysfunction; The latter's face is like a full moon, the abdomen is as big as a drum, and the skin is delicate and rough with amenorrhea and high blood pressure. In women with adrenal hyperplasia and tumor, excessive androgen secretion leads to excessive hair, clitoral hypertrophy. In addition, there are cases of hereditary hirsutism, drug hirsutism and neuroticism. It can be seen that if there are too many or too few pubic hair in women, if it is pathological, it is necessary to find a gynecologist in time. If it is within the normal range, it is necessary to make a correct conclusion through the doctor's examination. Why does pubic hair have pubic hair? Of course, not to decorate it, design styles and spray perfume for it. In the book Hair Loss and Regeneration, the author Walter Lannhard speculated that as early as the early days of human society, when people were naked and wore long hair, pubic hair could sometimes help distinguish men and women from each other at a distance. Dick Lannhard pointed out that the pubic hair shapes of men and women are completely different. Women are triangles and men are rectangles. Through the dense jungle, you can see the shape of pubic hair, and then decide whether to attack it or have sex with it. If it's a little abnormal, it may be both. Lannhard also explained that pubic hair is used to absorb water and keep the unique scent of sexual organs. He pointed out that if they smell this smell, they can think of sex and then have sex. The pubic hair is rough, curly and colored at the end, which means that the pubic hair can only grow to 1 inch or longer, and then it will fall off and be replaced by a new one. Pubic hair is not always the same color as your hair, so don't guess blondes. Why does this part smell? Sweat glands are mainly under the arm and between the thighs. These sweat glands emit sweat and mix with bacteria to produce a pungent and lasting smell. Nowadays, most of us don't want to smell like cavemen. Often wash pubic hair with soap, and the original taste disappears. If you want to remove pubic hair, you must be careful. Don't use depilatory, it will cause burns. Finally, pay attention to the itching when the pubic hair is long. The "pubic hair" complex Carter Tseng's sexology research society has developed modern medicine. Women without pubic hair can have pubic hair through surgery, but the cost of surgery is very high. Some women who don't have pubic hair know that they can have surgery, so they say, "I want to find a man who doesn't mind that I don't have pubic hair, and then I will have surgery after consultation with him." For women who are still hesitant about surgery like this, I might as well tell them what men think about it: A said, "Doctor! I don't think there is pubic hair in sculptures or nude paintings. Isn't it clean and beautiful? If only the woman I love had no pubic hair! If she has pubic hair, I hope she can shave it off. " B said, "Doctor! They say pubic hair can create orgasm and achieve excitement. Does pubic hair generate electricity because of friction? I think pubic hair helps orgasm. 1 A immediately retorted: "No! If the friction electrode is weak, I want to find a woman without pubic hair as my wife, so that the curve from the lower abdomen to the lower leg will look soft and beautiful. "After listening to the conversation between Mr. A and Mr. B, I quite agree with Mr. A that a woman without pubic hair looks very clean and beautiful. In the past few years in the hospital, if I see a woman's pubic hair as long as a child's hair, I will always be surprised; But when I see a woman with sparse and short pubic hair, I feel very beautiful and lovely. If she doesn't have pubic hair, the curve of her genitals is really beautiful. No pubic hair go to the pubic hair surgery, no hospitalization, but it will take five or six days. Transplanting hair roots one by one, this surgical technique is very delicate and not easy to do, so the cost is more expensive. No pubic hair is hereditary, and it will be hereditary even after surgery. Besides, it would be more beautiful without pubic hair, wouldn't it be great? Fingering techniques include directly stimulating sexy fingers when touching female pubic hair one by one. Especially from psychological stimulation. Can improve the sexiness of women at once; The best way is to rub on pubic hair. Pubic hair is the worst part of a woman's body. According to the data, most women are very concerned about the length and thickness of pubic hair. Under this psychological effect, the fingering of pubic hair arouses women's sense of shame, and then it turns into a strong sexual impulse, which makes women crazy. This is the most common finger technique. During sexual intercourse, when the penis rotates slowly in the female reproductive organs, if the man is in a normal position on the bed and his body is slightly raised, the fingertips of two or three fingers are repeatedly inserted into the pubic hair for combing. Whether rubbing with your fingertips or rubbing with your back, even fiddling with your hands, or playing around with your fingers, or combing carefully one by one, using your hands as a comb and combing carefully and slowly, are the key points of this technique. Of course, positions other than the normal position can also be performed. When a woman makes a promise, touching her pubic hair one by one will only arouse her stronger sense of shame. At the same time, I feel that my pubic hair is loved by men one by one, and my psychological pleasure is self-evident, which in turn stimulates strong sexual excitement. Compared with men, women feel more strongly about sexual intercourse. So they are often controlled by emotions and care whether they are loved or not. Only by understanding women's psychology can we give women real happiness, not only physically, but also mentally, and women will become "it doesn't matter if they are chaotic again" and "do whatever they want" ... In addition to this finger skill, we can also add a finger skill at the same time; That is to say, at the same time, finger a woman's hair and touch it one by one. Hair is also one of the psychological sensitive areas of women. If you can touch your pubic hair at the same time, your sexual excitement will be further improved. In addition, you can lick a woman's earlobe to her neck with your tongue. At this time, the movement of penis is based on the principle of slow and anxious rotary movement. This technique can be used not only in sexual intercourse but also in foreplay. This aroused women's sense of shame and disturbed her psychology. Is a woman without pubic hair a "white tiger" of Foucault? Some lovers hit it off as soon as they met, and soon vowed to marry each other and entered the marriage hall. But the groom found that the bride had no pubic hair and armpit hair on the wedding night, so he pulled his face down and insisted on divorce. The original image of the right person and soul mate has disappeared. Why? It turns out that this husband has heard that "a woman without pubic hair and armpit hair is a white tiger and Guanyin, and marrying her will be unlucky." "It's incredible that young people are so convinced of feudal dross today when science is so developed. There are also teenage girls who have had menstrual cramps for many years and have normal physical development. The only drawback is that there is no armpit hair and pubic hair. As a result, she was embarrassed to take a bath in the public bathroom. She was ashamed of this and worried all day, so she wrote to ask if marriage would affect her sexual function and fertility. Is there any way to make them grow pubic hair and armpit hair? So why don't some women have pubic hair and armpit hair? One of the reasons is the low level of androgen in women; The second reason is that the receptors receiving androgen in pubic and axillary hair follicles are insensitive to androgen or have other defects, and some of them are not at all. When pubic hair and axillary hair are highly sparse or missing, it is called alopecia, accounting for about 2.5% of the population. The endocrine, menstrual cycle, sexual development, sexual function and fertility of most women with alopecia are normal. Therefore, hair loss is physiological and will not affect their health and happy marriage. There is no need to worry, let alone believe false lies and be dominated by feudal superstitions. I hope there will be no family disintegration or even suicide in the future. It is worth mentioning that there are also a few cases of alopecia that are pathological, such as Turner syndrome, in which the chromosomes of patients are mostly 45 x and one sex chromosome is missing, which is caused by the non-separation or deletion of sex chromosomes during the maturation of sexual cells. This female patient has gonadal dysfunction, low performance, neck touching, breast dysplasia, childish external genitalia, hairless or hairless pubic mound, amenorrhea due to ovarian follicles, and can have sexual life but can't have children. Women with hypothyroidism have no armpit hair and less pubic hair, and can have sex, but their sexual desire is obviously reduced. Simple gonadal hypoplasia is accompanied by alopecia, and fertility can be restored after treatment. Female postpartum hemorrhage can cause Sheehan's syndrome with pituitary hypofunction. The patient is extremely emaciated, amenorrhea, infertility, hair and pubic hair gradually falling off, weak, and extremely low sexual desire. However, these lesions are often accompanied by obvious other symptoms, and they are often treated for other problems. If you find that there are many other changes in body function, don't take it lightly. It is best to go to the hospital as soon as possible for examination, symptomatic treatment or treatment. Pubic hair ◆ Bisexual glass house girls also began to grow body hair during adolescence. Girls first grow pubic hair in the vulva, which is the first change that some girls notice after entering puberty. Just as doctors divide the development of male sexual organs into five stages, they also divide the development of female pubic hair into five stages. 1 Stage is childhood, starting from the birth of a girl and continuing until the arrival of the second stage. At the 1 stage, girls will not grow any body hair. In the second stage, the fine hair of the boxing song began to grow. At this time, her age is generally around 1 1 year. In the third stage, pubic hair becomes darker, more curved, denser and covers a larger area. The age of girls entering the third stage is about 12 years old. In the fourth stage, the age is generally 12 or 13 years old, the color of pubic hair continues to deepen, the fist bends more seriously, and the coverage area continues to expand. The fifth stage is adulthood. The fully developed pubic hair is distributed in an inverted triangle. A few women even have pubic hair near the lower edge of the abdomen or buttocks. Generally speaking, girls at this stage are about 14 years old. Does the absence of armpit hair or pubic hair in women affect sexual function and fertility? There are girls who have menstrual cramps for many years and have normal physical development. The only drawback is that they have no armpit hair or pubic hair. As a result, she was embarrassed to take a bath in the public bathroom. She was ashamed and worried all day, so she wrote to ask if marriage would affect her sexual function and fertility. Is there any way to make them grow pubic hair and armpit hair? First of all, we seriously discuss the growth process and mechanism of female body hair (pubic hair and armpit hair). Normal women have less body hair than men, and there are great individual differences in color, length, thickness and density. Of course, it is also related to factors such as race and age. For example, the body hair of orientals is obviously thinner than that of white people in Europe and America. In addition, the distribution of female pubic hair is not all typical inverted triangles, but also shield-shaped, rectangular and inverted trapezoidal. Pubic hair is one of the signs of sexual development, which is generally consistent with the beginning of breast development. Its growth can be divided into five stages: the first stage: before 1 1 year old, there is no pubic hair growth, but only fine hair is distributed on the pubic mound, which is light in color and is called childish type. The second stage: 1 1- 12 years old, pubic hair began to sprout under the stimulation of sex hormones, first in the labia majora and then in the pubic mound, and the pubic hair was light, thin, soft and straight. The third stage: 12- 13 years old, the color of pubic hair deepens and begins to thicken, harden, thicken, lengthen and curl, covering the pubic triangle; The fourth stage: 13- 14 years old, continues to become dense, similar to the appearance of adult women, and its upper edge is mostly confined to the pubic mound, which has not yet expanded to the inner thigh and no longer expands upward. The fifth stage: 14- 15 years old, pubic hair is densely covered, the whole vulva is covered, the labia majora covers down the pubis, meets the anus, and reaches the inner thigh, which is a typical adult female pubic hair. The appearance of axillary hair is late, which is usually the last appearance in the process of female secondary sexual characteristics. The vast majority will not grow up until 17 years old. The growth of human hair is mainly controlled and restricted by androgen and estrogen. Androgen and estrogen have specific stimulation or inhibition effects on hair growth in different parts of the body, so the distribution of hair between men and women is different, while other primates rarely have such gender differences, and the mystery is still difficult to explain. For example, estrogen promotes the growth of hair, while androgen inhibits the growth of hair on both sides of the forehead, so men's hair is not as thick as women's, showing a specific concave hairline. For another example, androgen stimulates the growth of beard and chest hair, while estrogen inhibits their growth, so men have beard and chest hair (rare for yellow people), while women have neither. Estrogen and androgen can stimulate axillary hair and pubic hair, so both men and women have axillary hair and pubic hair growth (although the distribution characteristics of male and female pubic hair are different). The growth of body hair in men and women is mainly controlled by androgen (dehydroepiandrosterone) secreted by adrenal cortex. When female adrenal cortex function is low, hair will fall off, and hair can be revived after androgen injection. When a man has his testicles removed, his beard stops growing, but his armpit hair and pubic hair remain unchanged. So why don't some women have pubic hair and armpit hair? One of the reasons is the low level of androgen in women; The second reason is that the receptors receiving androgen in pubic and axillary hair follicles are insensitive to androgen or have other defects, and some of them are not at all. When pubic hair and axillary hair are highly sparse or missing, it is called alopecia, accounting for about 2.5% of the population. The endocrine, menstrual cycle, sexual development, sexual function and fertility of most women with alopecia are normal, so alopecia is physiological and will not affect their health and happy marriage, so don't worry, let alone believe rumors. It is worth mentioning that there are also a few cases of alopecia that are pathological, such as Turner syndrome, in which the chromosomes of patients are mostly 45 x and one sex chromosome is missing, which is caused by the non-separation or deletion of sex chromosomes during the maturation of sexual cells. This female patient has gonadal dysfunction, low performance, webbed neck, breast dysplasia, immature external genitalia, hairless or hairless pubic mound, accompanied by amenorrhea because there are no follicles in the ovary, and although she can have sexual intercourse, she is infertile. Women with hypothyroidism have no armpit hair and less pubic hair, and can have sex, but their sexual desire is obviously reduced. Simple gonadal hypoplasia is accompanied by alopecia, and fertility can be restored after treatment. Female postpartum hemorrhage can cause Sheehan's syndrome with pituitary hypofunction. The patient is extremely emaciated, amenorrhea, infertility, hair and pubic hair gradually falling off, weak, and extremely low sexual desire. However, these lesions are often accompanied by obvious other symptoms, and they are often treated for other problems. If you find that there are many other changes in body function, don't take it lightly. It is best to go to the hospital as soon as possible for examination, symptomatic treatment or treatment.