First, the principle of laser hair removal.
Laser hair removal is based on the principle of selective photothermodynamics, through reasonable adjustment of laser wavelength, the beam will penetrate the surface layer of the skin and finally be absorbed by the hair follicle, through the selective absorption of laser energy, so that the hair follicle is damaged, so that the hair loses its ability to regenerate, while not damaging the surrounding tissue. Plastic surgery experts adjust to a specific wavelength of laser light through the epidermis, the effect of laser hair removal due to the irreversible process of heat absorption necrosis of hair follicles, therefore, laser hair removal or photon can achieve the effect of hair removal of long-term hair removal.
Second, hair removal features.
1, using the best wavelength for treatment: the laser can be fully selectively absorbed by melanin, while the laser can effectively penetrate the skin to reach the location of the hair follicle. The action of the laser is effectively reflected in the melanin in the hair follicle to produce heat for hair removal.
2, the best hair removal effect, the required laser pulse time is related to the thickness of the size of the hair, the thicker the hair requires a long laser action time, in order to obtain the ideal effect at the same time can not damage the skin.
3, laser hair removal treatment hair will not be like the traditional hair removal methods after hair removal in the skin surface pigmentation, this is due to the laser hair removal treatment, the skin absorption of the laser less.
4, the use of cooling system, in the whole process of effective protection of the skin from the laser burns.
Third, the hair affects.
1, hair is divided into three periods, respectively, the anagen phase, degenerative phase, stationary phase, the energy emitted by the laser instrument can only destroy the hair follicles in the anagen phase, no obvious effect on the hair in the degenerative phase, stationary phase, only when these hairs turn into the anagen phase after the laser can play a role, so laser hair removal requires multiple treatments, the effect can be obvious.
2, such as a part of the hair in the growth period of the proportion of small, the number of treatment to increase. On the contrary, the number of treatments can be reduced.
3, based on different parts of the hair has a different growth cycle, each treatment interval also has differences. For example, the head hair has a relatively short resting period, so the interval can be as short as one month. The resting period of trunk and extremity hair is relatively long, so the treatment interval is about 2 months so that you can easily enjoy the confidence brought by silky skin.
4.If the density of hair follicles in a certain area is too high, the laser energy should be reduced appropriately during the treatment.
Fourth, hair removal effect.
After 3-5 sessions, more than 95% of the cases have 80% of the hairs fall off, the hairs become less, finer, lighter in color and slower in growth.
If only 1-2 sessions are carried out outdated, all cases prove 30% to 50% hair reduction.
V. Influencing factors.
1, different equipment laser hair removal effect is also different.
In terms of equipment, different treatment equipment in terms of the effect is a certain difference, the laser light source on the laser hair removal effect is a great influence, that is to say, some laser light source intensity is relatively large instrument, its treatment effect will be better than those light source intensity of small instruments.
2, body differences also affect the effect of laser hair removal.
Each person’s physique is different, and the density of hair, growth ability is also different, the effect of hair removal is also different, so different individuals adopt the same hair removal method, some sensitive people, they may be able to remove all at once, while some other people who are not sensitive, may have to take off many times to achieve the point effect.
3, skin and hair color differences lead to different laser hair removal effect.
Skin color and hair color differences, treatment will also have some differences, because the laser treatment is extraordinarily selective, it is based on the pigmentation of the skin to decide, that is, different parts of the hair follicle on the laser hair removal response is different, in the same individual, different parts of the hair removal effect is also different, because the pigmentation of different parts is also different.
4.The doctor’s experience determines the effect of laser hair removal.
Doctor experience is also crucial here, as experienced doctors can correctly grasp the direction of your hair removal, as well as the indications or contraindications for hair removal, and can adjust the treatment plan in time to solve some of the conditions that occur unexpectedly during the treatment process.
Sixth, the laser hair removal adaptation object.
Laser hair removal is applicable to all parts of dark and light colored hair but invalid for white hair, all parts of the body (upper and lower limbs, large and small legs, chest, abdomen, hairline, facial beard, outside the bikini line) excess black hair. Electric needles, drugs, electric tweezers, other instruments hair removal is ineffective or failed.
(A) Contraindications.
1.Allergic or scarred body.
2, suffering from hepatitis, syphilis, skin infection.
3, blood diseases and coagulation mechanism disorders.
4.Menstruating women.
5.Take vasodilator drugs and anti-arthritic drugs before surgery.
(II) Relative contraindications.
1.Allergic to hydroquinone or other bleaching agents.
2.History of keloid scars.
3.History of using 13-cis-retinoic acid within 6 months.
4, within 6 weeks, have used other ways (such as waxing) hair removal.
5.The skin color test must be done before laser hair removal, generally speaking, black skin is not suitable for laser hair removal.
Seven, precautions.
(A) Pre-operative.
1, laser hair removal before, to clean and disinfect the parts to be hair removal. Some women themselves at home wax hair removal, it is best to use a small amount of talcum powder to absorb the oil on the surface of the skin to enhance the adhesion of the wax. In addition, because the capillaries, capillary nerves concentrated in the root of the hair, yanking hair easily cause pain.
2, before the laser hair removal, wrapped in a towel with ice, cold compress in the hair removal parts can reduce the pain. Hair removal should not be too hard, otherwise it will stimulate the skin and intensify the pain.
3, for the darker skin type III-V skin patients, before surgery should avoid sun exposure as far as possible, preferably with sunscreen for 4-6 weeks, those who have a tendency to pigmentation at the same time can add hydroquinone drugs to prevent.
4, the treatment area must be prepared before surgery, thoroughly scraped hair.
5, do not use hair removal cream, hair removal cream and other cosmetics before hair removal.
(II) Postoperative.
1, after phototherapy or exposure to the sun, the skin is stimulated and damaged, which may cause pain, dryness, flaking, and allergies and other phenomena, and then cause side effects such as discoloration and scars, and even cause excessive relative illumination of light energy during secondary phototherapy care, increasing the risk of returning to black. Therefore, professional post-phototherapy repair products are needed.
2.After laser hair removal, please avoid sunlight within six months, and use the sunscreen lotion directed by the doctor on the affected area to reduce sunlight exposure.
3.After hair removal, hair removal area may produce slight redness, skin sensitivity and hot or itchy feeling, if you feel pain, use ice to reduce the pain.
3, pay attention to the hair removal parts do not hot water scalding and hard scrubbing.
4.A week after hair removal, do not use soap and other alkaline toiletries to take a bath.
Eight, out of the misunderstanding.
1.Is laser hair removal safe?
Laser hair removal is a very safe hair removal method: targeted, no side effects on the human body, almost no impact on the skin.
2, do laser hair removal precautions.
Do laser hair removal should pay attention to, hair removal parts in the week before treatment and two weeks after treatment sun protection, hair removal parts should not do plucking, wax hair removal and electrolysis hair removal two weeks before treatment.
3.How many times does laser hair removal need?
Laser hair removal generally requires three to six times, mainly because of two factors: first, most of the hair follicles are a group of three bundled together, opening in the same pore, a hair in the pore is a group of three hair follicles below it in a group of hair follicles grow hair, so a treatment can only destroy a group of hair follicles. Secondly, hair growth should go through the anagen phase, the regressive phase and the resting phase. 75% of the hair in the anagen phase is effective, 25% in the regressive phase and almost invalid in the resting phase.
4.Does laser hair removal affect perspiration?
Laser hair removal only works on the melanin in the hair follicle, but there is no melanin in the sweat gland, so it will not absorb the laser ability and damage the sweat gland, and there is no other adverse effect on the human body. Therefore, laser hair removal will not affect sweating.
5.Does laser hair removal have any harm to the skin?
The human skin is a relatively light-transmitting structure, plastic beauty experts clinical experiments found that in front of the powerful laser, the skin is simply a transparent cellophane, so the laser can very smoothly through the skin deep into the hair follicle, because the hair follicle has a lot of melanin, so it can preferentially absorb a large amount of laser energy and eventually converted into heat energy, so that the hair follicle temperature rises, to achieve the purpose of destroying the function of the hair follicle. In this process, the skin itself will not have any damage because the skin relatively does not absorb laser energy, or absorbs very little laser energy.
6.Is the effect of laser hair removal permanent?
For the effect of laser hair removal is able to remove hair permanently, of course, in the hair growth period the treatment effect is the best, the more melanin secretion, the better the treatment effect. Laser hair removal is not very useful for hair in the regressive and resting phase, but laser hair removal can inhibit the rapid growth of hair in the short term to achieve the intended effect.
7.Will laser hair removal make the pores bigger?
The pores will not become bigger and coarser after photo hair removal, on the contrary, the skin will become smoother and more delicate after hair removal. The reason why the pores will not become thicker after photorespiration is that the light of photorespiration can effectively pass through the skin to reach the location of the hair follicle, and can be fully absorbed by the hair follicle tissue and destroy the hair follicle, so that the hair follicle is in a state of atrophy, making the pores naturally thinner and smaller. Therefore, after the photo hair removal treatment, instead of making the pores thicker and larger, the pores will be thinner and smaller, and the skin will be fine and smooth.