Is laser hair removal safe? Can I achieve permanent hair removal?

  The hot summer is coming, and it’s a good time for girls to wear halter dresses to show their legs, so how can you let your armpit hair, arm hair and leg hair show? So the question is, which is the best hair removal method? The well-known hair removal methods are shaving, waxing, hair removal cream, etc., but they only destroy the hair shaft, not the hair follicle. This means that the hair will grow back from the follicle.
  To put it simply, these are temporary solutions, treating the symptoms but not the root cause; and more importantly, the above methods may make the new hairs more and more “thick” because of repeatedly stimulating the skin and hairs, and each hair removal adds a little burden to another hair removal act in the future.
  Is there any way to remove hair permanently?
  In recent years, the concept of medical aesthetics has gradually become familiar to the public, and some women who attach more importance to shaping their own beautiful image have started to seek new and more effective ways of hair removal. They found electrolysis method hair removal (old method), thermal dissolution method hair removal (old method) and laser hair removal (new), all three of them, can achieve permanent hair removal effect. However, electrolysis method hair removal and thermal dissolution method hair removal are less operable in actual use due to tedious operation, long treatment time, many times of treatment, strong pain, may cause skin damage and scar formation, etc., and have been discontinued.
  What kind of effect can laser hair removal achieve?
  The picture above left (A) is the original state before the hair removal treatment, and the picture above right (B) is the state after 3 treatments and 15 months after the operation.
  You read it right, this is an additional effect of laser hair removal, because the epidermis also exists evenly distributed melanin, in the process of hair removal, the epidermis of melanin absorption of heat disintegration broken, and then metabolism out of the body, will make the skin white; in the thermal effect of the laser, collagen contraction after heat, from the triple helix structure converted to disorderly curl structure, so that collagen fibers with the protein chain folding and thickening and shortening, and The collagen fibers will be thickened and shortened as the protein chains are folded and present a more stable conformation, resulting in a more “elastic” skin, thus achieving the effect of skin rejuvenation.
  How many times does laser hair removal need to be done?
  In order to achieve good hair removal results, 4 to 6 laser hair removal sessions are required. Since hair growth is in the anagen, resting and regressive phases, a single laser treatment is more effective only on those hair follicles in the anagen phase (high melanin content and many target chromophores), while those in the regressive and resting phases have very little melanin content and the laser will only work when these hairs are in the anagen phase (which often takes 2 to 4 months).
  Therefore, laser hair removal needs several times (usually 4 to 6 times) to ensure the treatment effect, each treatment time interval to 1 month is appropriate, also can be treated again when more hair development is found to regrow.
  However, some friends still have new hair growth after 6 times. In this case, it is necessary to see whether the new hair growth is “thick” like the original final hair or soft and fine “fine hair” like the baby’s skin. If it is the former, then the treatment should be continued – it can’t be helped, it only means that there are still hair follicles that have just entered the growth phase; if it is the latter, then it is generally considered that the “fine hair” is already the end of the treatment, such hair has less melanin content and reacts poorly to the laser, so it is not very meaningful to continue the treatment.
  Which parts are suitable for laser hair removal?
  1.Upper lip and beard
  2.Underarm
  3.Chest and abdomen, back
  4.Arms, legs
  5.Lower abdomen “bikini” area
  Is laser hair removal expensive?
  After reading the introduction, there must be many girls moved, no pain, no skin damage, the effect is exact, no need to take time off work after treatment, once a month treatment can be, after several treatments can be permanent hair removal …… Then, the treatment cost is expensive ah?
  The treatment cost will fluctuate according to different treatment areas, but the principle is: the larger the area, the higher the cost. At present, there are various manufacturers of various laser equipment on the market, from beauty salons to tertiary hospitals are providing related treatment services, the offer from a few hundred to tens of thousands of dollars, we inevitably choose to be blurred. My advice is to choose a hospital above the second level and a private hospital with a formal business license, pay attention to see if the equipment is in normal use and if the relevant practitioners are qualified. You can compare multiple hospitals and choose the one you trust the most for treatment.
  How is laser hair removal achieved?
  As we know, light has a wavelength, and the longer the wavelength, the deeper the penetration of the substance. Different substances do not absorb different wavelengths of light with the same efficiency, so scientists have found a suitable wavelength range ( 600 to 1100 nm) that allows the beam to penetrate to the depth of the hair follicle and allow the melanin to absorb the most laser energy. In this way, the laser energy reaches the vicinity of the hair follicle, where the melanin in the hair absorbs a large amount of energy and the temperature rises dramatically, resulting in the destruction of the follicular tissue and the removal of the hair. During this process, the melanin in the hair follicle absorbs most of the energy, so the energy diffused to the surrounding skin tissue is relatively low.
  What are the precautions for laser hair removal?
  1, first scrape the visible hair on the skin surface: the laser is like a precise sniper, with a special bullet (wavelength), aiming at a target (melanin), while the surrounding passers-by (other tissues and structures of the skin) are not affected at all. Because of this absorption of light energy by melanin, the hair in the area of hair removal needs to be shaved before the procedure. Otherwise the local skin will be burned due to the large amount of energy absorbed by the hairs on the epidermis, and in severe cases, it may even cause pigmentation, which not only increases the treatment pain, but also affects the treatment effect due to the low absorption of light energy by the melanin of the hair follicles. After shaving the skin, the pain will be greatly reduced during the treatment.
  2, need to complete the full course of treatment: there are some friends, may be only two or three times, or even only one treatment, and did not complete the whole course of treatment. Will this instead lead to the growth of hair? The answer is: it will not lead to more and thicker hairs in the rebound, but the treatment effect will be covered. With only one treatment, only the hair follicles in the anagen phase are destroyed, and some of them are already unable to grow final hairs. However, due to the limited effect of one treatment, as time advances, the hair follicles in the resting and regressive phases enter the anagen phase, and, due to the safety range of laser energy, the anagen hair follicles cannot all be destroyed in the first treatment, and the hair density will seem to be close to the original state. Therefore, if you have only done one or two treatments and want to continue the treatment after six months, you still have to start from the beginning.
  3.Before laser hair removal, you need to do some preparation.
  ① Avoid sunlight in the hair removal area and use sunscreen for more than 2 weeks.
  ② Clean the skin of the hair removal area, remove the surface oil, shave the hair (hair scraper can be, stick to the root of the hair to scrape, pay attention to prevent scratching). 
  ③ people who are particularly sensitive to pain can be surface anesthesia in advance, such as topical application of compound lidocaine cream.
  4.Laser hair removal has slight side effects: there will be a slight stinging sensation during laser hair removal, there can be a mild burning sensation after the procedure, and mild erythema and follicular papules appear on the local skin, which can disappear within a few hours. Individual patients may experience purpura, blistering, temporary hyperpigmentation or hypopigmentation, most of which can recover in a few months.
  In addition, because of the tingling and painful stimulation that may stimulate contractions, it is not recommended for pregnant women, so expectant mothers should wait for now. The way to reduce the appearance of side effects is to do a good job of pre- and post-operative sun protection, shaving the epidermis before surgery, applying ice packs during and after treatment, and then applying topical skin care ointments. After laser hair removal, it is important to pay attention to the external application of sunscreen before outdoor activities. In addition, a small number of people are sensitive to laser stimulation reaction, in order to avoid side effects, you can do a few spots of localized experimental treatment first, and make sure there is no problem before treating a large area.