The Mediterranean is related to heredity.
However, there are other factors that affect the plastic surgeons in Yanghe Hospital. Dr. Xie said that baldness can cause a lot of hair loss at the same time, most of which starts from the forehead, and the hair becomes sparse, gradually spreading back to the top of the head, forming a "Mediterranean" situation. Some people's hair will gradually fall off after a few years, and some people will go bald in a short time. Everyone has different degrees of baldness, but most men find that they have lost a lot of hair when combing their hair, or feel that their hair is thinning and go to the doctor. There are many types of baldness, among which male premature alopecia is the most common, accounting for 95% of the total baldness. 1. Male premature alopecia can be seen as early as the twenties. This kind of alopecia is mostly hereditary and may also be related to excessive androgen. Too much androgen makes hair follicles shrink, leading to hair loss. However, some people are allergic to hair follicle receptors, and hair follicle recipients think that there are too many men in the human body, and their hair is particularly prone to fall off, causing baldness. 2. Alopecia areata is related to the abnormality of the body's own immune system, such as systemic lupus erythematosus, or affected by daily life, such as excessive mental stress, which sometimes leads to hair loss. As for the so-called "ghost shaving", it is a serious situation of alopecia areata. There will be a "pinch" of hair on the head that suddenly turns white or falls off completely overnight. These are all symptoms of alopecia areata. When the patient's stress passes, the hair will return to normal and grow again. 3. Scar alopecia This is mainly caused by fungal infections such as tinea capitis, trauma, burns and seborrheic dermatitis. The injured head skin is also damaged by hair follicles, so it can no longer grow hair and form baldness. 4. Other causes of baldness * Thyroid function problems, too little thyroxine secretion can not maintain hair metabolism * Insufficient nutrition * Masculine alopecia (Masculine alopecia
MPHL) commonly known as "Mediterranean", the patient is the first to get sick? Moving backward, the hair on the top of the head gradually falls off, leaving only the hair on both sides and the back of the head. MPHL is usually influenced by heredity, and a man can inherit this feature from his father or mother. With the increase of age, the male hormone testosterone increases. When testosterone binds to an enzyme called 5-α reduction, dihydrotestosterone (DHT) is produced, which is the chief hormone leading to hair loss. For men with hereditary male alopecia, when the scalp contains a large amount of dihydrotestosterone (DHT), the following situations will occur:-The head length will be shortened, and the hair will be shortened after stopping growth. -After several growth cycles, the hair is getting shorter and shorter, although women also have female pattern alopecia (female pattern alopecia)
FPHL): The hair on the top of the head is getting less and less, but it will not be completely "bald". Because the part of hair loss is not as obvious as that of men, it seems that the proportion of male hair loss is more.
Reference:. qid=7006080300367
1. Open the world map and you can see that there is a sea between Europe, Asia and Africa, that is, the Mediterranean Sea. It is the largest land ocean in the world. It is about 4,000 kilometers long from east to west and 1800 kilometers wide from north to south, covering an area of more than 2.5 million square kilometers. In the western Mediterranean, there is a strait of Gibraltar with a width of 2 1km, which leads to the Atlantic Ocean. The east can enter the Indian Ocean through the Suez Canal, and the northeast is connected with the Black Sea through the Da Daniil Strait and the Bosporus Strait. The Mediterranean belongs to the Ionian Sea, Adriatic Sea and Aegean Sea. The Italian Peninsula, Sicily, Tunisia and the underwater ridge between them divide the Mediterranean into two parts. The countries bordering the Mediterranean are: Algeria, Tunisia, Libya, Egypt, Israel, Lebanon, Syria, Turkey, Greece, Albania, Yugoslavia, Croatia, Italy, Spain, France, Portugal and Morocco. The Mediterranean climate is unique, with dry heat and little rain in summer and warm and humid in winter. This climate makes the surrounding rivers rainy in winter and dry up in summer. Few places in the world have this kind of climate. According to statistics, the total proportion of * * * is less than 2%. Because of the special climate here, German meteorologist Ke Ben regarded it as a special category when he divided the global climate, and called it Mediterranean climate. Although there are many rivers flowing into the Mediterranean, such as Nile, Rhone and Ebro. Because it is located in the subtropical zone, the evaporation is too large, far exceeding the supply of river water and rainwater, which makes the water income in the Mediterranean less than the expenditure, and the salinity of seawater is much higher than that in the Atlantic Ocean. The water from the Atlantic Ocean flows into the Mediterranean Sea from the upper layer of the Gibraltar Strait, and the high salt water from the Mediterranean Sea flows into the Atlantic Ocean from the lower layer of the Strait. The Atlantic Ocean is very big and there is plenty of water. The amount of clean water flowing into the Mediterranean Sea is very large, up to 7000 cubic meters per second. Without the continuous water supply from the Atlantic Ocean, the Mediterranean will dry up and become a huge salt pit in about 1000 years. Now, the Mediterranean Sea is a subsidiary sea of the Atlantic Ocean. However, in geological history, it is older than the qualification of the Atlantic Ocean. About 65 million years ago, the ancient Mediterranean was a vast Tethys Sea. It has a wide range, crossing the Himalayas eastward and heading straight for the ancient Pacific Ocean. At that time, it was second only to the Pacific Ocean, and the Atlantic Ocean had not yet formed! Later, the Eurasian plate in the north drifted, approached the Indian plate in the south, collided and squeezed out a Himalayan mountain, and the Tethys Sea retreated to the present Mediterranean Sea. The Mediterranean coast is one of the cradles of marine civilization. Phoenicians, Cretes, Greeks, and later Portugal and Spain are all nations with developed navigation industry, and many great navigators were born here. Columbus, who discovered America, Da Gama, who opened the Atlantic and Indian Ocean routes, and Magellan, who sailed around the world for the first time, are all outstanding representatives. At the same time, the famous European Renaissance movement was first launched here. Copernicus, the founder of Heliocentrism, and Galileo, the great physicist, were also born here. People here have made important contributions to the progress of modern human science and civilization. 2. Male pattern alopecia
MPHL) commonly known as "Mediterranean", the patient is the first to get sick? Moving backward, the hair on the top of the head gradually falls off, leaving only the hair on both sides and the back of the head. MPHL is usually influenced by heredity, and a man can inherit this feature from his father or mother. With the increase of age, the male hormone testosterone increases. When testosterone binds to an enzyme called 5-α reduction, dihydrotestosterone (DHT) is produced, which is the chief hormone leading to hair loss. For men with hereditary male alopecia, when the scalp contains a large amount of dihydrotestosterone (DHT), the following situations will occur:-The head length will be shortened, and the hair will be shortened after stopping growth. After several growth cycles, hair is getting shorter and shorter, although women also have female pattern hair loss.
FPHL): The hair on the top of the head is getting less and less, but it will not be completely "bald". Because the part of hair loss is not as obvious as that of men, it seems that the proportion of male hair loss is more. 3. Thalassemia is a hereditary anemia. Because of the patient's own hemoglobin production function, he can't produce red blood cells, which leads to long-term hemolysis and anemia. This disease is mainly prevalent in the Mediterranean and other tropical and subtropical regions, so it is called thalassemia. The main function of human red blood cells is to transport nutrients to all tissues of the whole body, and hemoglobin is an important element in red blood cells. Bone marrow is the organ that makes red blood cells. In the case of long-term anemia, the bone marrow of thalassemia patients is particularly active, but it can't effectively produce and release red blood cells, so the red blood cells containing abnormal hemoglobin are accelerated to decompose in the human body. However, because there are not enough red blood cells and hemoglobin, the tissues of the whole body cannot function normally because there are not enough nutrients, which constitutes anemia. 2006-11-114:1:52 supplement: garbage.