Laser hair removal
1 Laser hair removal is faster and less painful. With luck, it can be done once and for all. It is much safer than electro-acupuncture hair removal which can only pull out one hair at a time (this is the only permanent hair removal method approved by the US Food and Drug Administration). Laser can remove a hair at the same time, and the risk of leaving scars after skin burns is minimal. After a few months, the number of hair that the company commander came back will be significantly reduced.
Laser hair removal is generally based on the principle of selective thermokinetics, using the latest laser technology to remove hair. The beam emitted by the laser machine will penetrate the skin surface and be absorbed by the hair follicle. By selectively absorbing laser energy, hair follicles will be damaged, hair can no longer grow, and surrounding tissues will not be damaged. The process of laser hair removal is simple and quick, and there is generally no scar after treatment.
Laser therapy uses a series of laser pulses, which will be accompanied by a little tingling or slight burning sensation. Most patients can easily receive treatment without anesthesia. Local anesthetics can be used externally before treatment of eyelids, oral cavity and other parts.
During the treatment, some patients may have temporary redness and even slight itching of the skin. After several hours of treatment, the redness subsided and the skin returned to normal. Laser will not damage the skin, so there is no need to do any treatment. After treatment, the discomfort is small and does not affect normal life and work. It takes different time to treat different parts. It takes 5 to 10 minutes to treat lips and beards, 30 to 40 minutes to treat hair on both legs, and about 90 minutes to treat hair on both legs.
Laser depilates hair follicles by destroying them. Hair follicle growth can be divided into growth period, rest period and regression period. Among the growing hair follicles, melanin is the most abundant and absorbs the light emitted by laser most strongly, making it the best target of laser depilation machine. The more melanin, the more certain it is, the higher the hit rate, and the more destructive it is to hair follicles. Laser has little effect on hair follicles in retrogression and no effect on hair follicles in rest.
Therefore, it is still possible to regenerate some hair after depilation, but the new hair will become slender and inconspicuous, and the effect will vary from person to person. Some people will grow hair after 6 months, while others will regenerate it after 2 years. Because some hair follicles are in a static and degenerative state at any time, it takes many treatments to achieve the effect of destroying hair follicles. It takes 3 ~ 4 times to remove the hair of limbs, with an interval of 1 ~ 2 months. Some patients who treat male upper lip beard sometimes need 7 ~ 8 treatments.
Laser hair removal is not perfect, because it is most suitable for people with light skin color and deep hair, and the treatment range is locked in "dark pigment". If your skin color is dark, the laser will destroy the skin pigment, resulting in white spots or dark spots, which often take several months to gradually recover. Before laser hair removal, you should choose a doctor with rich experience in laser operation; Careful maintenance and strict sun protection should be taken after operation.
References:
Sanjiu healthy network
There are many ways to remove hair, and laser hair removal is one of the most effective and authoritative hair removal methods at present! It brings a good hair removal method to many women who love beauty. For modern people who want effective, safe and long-term hair removal, laser hair removal should be the best choice. The following is the explanation of laser hair removal by Professor Jia Tieli, secretary general of China Plastic Surgery Foundation and chief expert of Zhongguancun Plastic Surgery Hospital.
Although the problem derived from hair is not a disease, from the perspective of modern aesthetics, too much or inappropriate hair will indeed cause physical or psychological harm to the parties concerned. Just like a overgrown garden, it is inevitable that someone will want to go and then go soon. I hope there is no extra hair between gestures, and cleanliness is the most beautiful. In the last two weeks, laser hair removal projects in plastic surgery departments of major hospitals in Beijing have been extremely hot. Some women are worried about the hair on their armpits, calves and arms, while others are embarrassed by the fluff on their lips. Professor Huang said that two-thirds of outpatients are women with the above problems, but men are not without them. Most of them want to remove excessive hair from their chest and back by laser. At present, the application of hair removal laser, except pathological hirsutism, removing the hair with the original male characteristics after changing from male to female, or removing the hair of the original skin flap after skin flap transplantation, other patients who require hair removal mostly take aesthetics as the starting point. Therefore, it is very common for women to remove leg hair, hand hair, beard and even armpit hair. Some patients require eyebrows to be trimmed, and it is not uncommon to trim excess pubic hair. Recently, more and more patients have asked to remove the hair from their foreheads, expose a wider range of foreheads, and even ask for autologous fat breast augmentation. Whether modern aesthetics has focused on the forehead or other reasons remains to be understood by doctors. In recent years, laser has also been applied to hair removal. Axillary hair, leg hair, beard, or hair with conspicuous corners of women's mouths are all suitable for laser hair removal. The principle is that melanin in hair follicles will absorb the energy of laser and destroy hair follicles through the exchange of generated heat energy. The energy of laser can enter the hair follicle along the hair shaft, and the hair follicle is destroyed by the energy, so that the hair stops growing.
Many women are also worried that destroying hair follicles may be detrimental to perspiration. In fact, laser hair removal technology is very mature at present. After a day or two of treatment, there may be slight redness and burning sensation, but as long as ice is applied, the discomfort will subside within a day or two. Laser will not damage skin tissues other than hair follicles, so perspiration will not be hindered. Affected by doctors' inexperience, poor quality of laser equipment or personal physique, some people will have local pigmentation or loss after operation. "
Professor Jia Tieli, secretary-general of China Plastic Surgery Foundation and chief expert of Zhongguancun Plastic Surgery Hospital, described the treatment process of laser hair removal quite simply: first, communicate with the doctor to see if your skin is sensitive, then conduct pigment examination and experimental laser irradiation, and then you can remove hair. The treatment time usually depends on the treatment site. Generally, it takes 10 minutes for underarm hair removal, and 30 minutes for calves and arms. Four to five courses of treatment can completely depilate, and the interval between each treatment is 6-8 weeks.
But what is more troublesome is that the growth of hair has three stages-growth period, middle period and rest period. This melanin pigment only appears in the growing period. It is conceivable that laser treatment can not inhibit the growth of all hair follicles. More specifically, in fact, all hair removal methods, including laser, can only work on these growing and visible hairs. So basically, hair removal should be carried out in stages, about once every three months.
"In fact, many people will ask the same question when they come to consult: Can laser hair removal really be complete? I heard that fine hair will grow after the operation! " Without waiting for a reporter's question, Professor Jia Tieli, secretary-general of China Plastic Surgery Foundation and chief expert of Zhongguancun Plastic Surgery Hospital, grasped the issues that everyone was most concerned about.
Professor Jia Tieli, secretary-general of China Plastic Surgery Foundation and chief expert of Zhongguancun Plastic Surgery Hospital, said that laser hair removal actually makes the laser penetrate into hair follicles and burn the hair one by one through proper irradiation, thus destroying the hair follicles and achieving the purpose of no longer growing body hair. However, because the hair itself has a strong regenerative ability, it is difficult to cover all the body hair in one operation, so a small number of hair follicles will become "fish escaping from the net." In order to achieve the goal of completely smooth skin, it usually takes four or five treatments.
Professor Jia Tieli, secretary-general of China Plastic Surgery Foundation and chief expert of Zhongguancun Plastic Surgery Hospital, reminded young women that black has a strong ability to absorb laser light, so people who are tanned or have dark skin color are not suitable for this hair removal method, otherwise they will burn their skin. After laser hair removal, you need to pay attention to sun protection, otherwise local pigmentation will occur. ▲
From 1996, a variety of hair removal lasers approved by the US Food and Drug Administration have been widely accepted for their safety and effectiveness, and have been in the United States for more than three years. Laser hair removal is the use of long-wave laser to extend the pulse time, directly destroy the melanin around hair follicles, and achieve direct and indirect damage to hair follicles. Clinically, the mode of anesthesia is determined according to the different parts. Small parts can be directly anesthetized locally, and large parts such as thighs can be rubbed with local anesthetic for two hours before laser application. Some people even need ice for ten minutes to achieve pain relief.
Laser hair removal takes about an hour and a half for two calves, and it takes about half a day with anesthesia. Moreover, because of the hair growth cycle, each hair removal area needs to be irradiated two or three times, and each irradiation should be separated by one to two months to have an ideal effect. Some people only have local redness and swelling after laser irradiation, which will fade automatically after half an hour. Some people will have blisters and moderate redness and swelling, which will disappear within one week after proper treatment without leaving scars. Hair will naturally fall off after a week of laser irradiation, and the effect is about 70% after the first irradiation. The regenerated hair will be thinner and lighter in color, and can be irradiated for the second time after one month.