Hair unsightly, poorly placed, too heavy or too visible, the laser hair removal is reported? What is the principle of laser hair removal ? Update with Dr. Catherine Goursac *, aesthetic doctor.
The life of the hairs
Dr. Catherine Goursac: The hair cycle varies by area. It is for example 4 to 5 months on the face, but can reach 12 to 18 months or more to other parts of the body. We must understand that hair grows in bursts. To remove hair , it is essential to exhaust each burst, which takes time (several sessions of hair removal are required spaced).
To know also that the hair will decrescendo women: they have less and less hair from 25 years, a trend that progresses until the end of life. But in the face, the reverse happens: the hair growing from quarantine, especially around the mouth. This is a hormonal phenomenon.
In men also hairs decrease with advancing age, especially on the arms and legs.In contrast, the hair tends to increase up to 40-50 years on the back and torso.
Thus, when one destroys hair in a woman, they will not grow (except hormonal problem, for example). In humans, they will not grow either, except on the back and torso, specifically in places where hair had never existed.
To eradicate the hair from all sides, the laser hair removal is the most effective treatment (more effective than flash lamps or pulsed light).
What do you think of small personal laser Hair Removal?
Dr. Catherine Goursac: You can buy, especially on the Internet, small laser tweezer to use yourself at home. But beware, their use can be risky. Indeed, if they can work on areas where hair is in sharp decline, however, where the hairs are growing, it could make them stronger and to stimulate hair growth. The greatest risk with these devices relate to the waxing of the face of women and areola, and the waxing of the shoulders, back, ears and torso in men.
Why did one get to such stimulation hair? Because these devices are not powerful enough. Result, they damage the hair instead of eliminating them, which strengthens them.
The beauticians were facing the same problem. Indeed, as they are not doctors, they do not have access to lasers powerful enough. Now all laser that lacks power may stimulate hair growth instead of eliminating them. Thus, since July 2008, the depilation laser can be performed by a doctor or a nurse rigor of state and under the supervision of a physician.
How does laser hair removal?
Dr. Catherine Goursac: The heat produced by the laser destroys the hair root.The laser hair removal with a wavelength absorbed by the chestnuts, it produces energy when it encounters the color brown. Thus it destroys hair at the root where the pigment is concentrated. In contrast, the laser does not work on white hair, blonde transparent, red, or on down. Also note that the skin, even if it absorbs 30 times less laser hair than the bubble, must not be overloaded with melanin, the pigment that colors the skin, the risk of burning.The hair removal laser skin very dark or tanned is tricky. Ultimately, the ideal candidate for the laser hair removal has fair skin brown hair. Under these conditions the best results are obtained.
How many laser hair removal sessions are required?
Dr. Catherine Goursac: The standard protocol includes 5-6 sessions at intervals of increasingly longer (6 weeks, then 2 months and 3 months apart). At first it is necessary to close the sessions, just before the regrowth of hair.
This approximation of the sessions also circumvents our biggest problem, stimulating hair growth which occurs whenever the hair is only scratched and not destroyed. For sensitive areas (growing hair), very close sessions, high power, and with a very suitable material, can achieve good results.
At what age can you get laser hair removal?
Dr. Catherine Goursac: There is no set age. However, it was noted that the adult hair is not completely reached until 20-25 years. Thus, for the same result, a girl under 25 years will have more sessions of laser hair removal . Beyond 25 years, the number of sessions decreases.
What are the side effects of laser hair removal?
Dr. Catherine Goursac: The laser hair removal can cause burns in several ways.If the skin is tanned, the laser will target the melanin, the pigment of the skin and cause burns. You should know that the melanin in tanned skin lies on the surface, while a matte skin naturally contains melanin in depth. Therefore, to equal skin color, tanned skin may burn more readily than dark skin.
Burns can also occur when dealing with difficult hair, that is to say, at risk of stimulation, because the laser power must be increased.
But practiced by experienced professionals, the laser is not dangerous, because the risks are managed burns are benign (they form scabs that fall within a few days).
The other problem of laser hair removal is the lack of result, which occurs more often in people with hormonal disorders or who are heavily shaved before the meeting.
Note that in women who have significant facial hair due to a hormonal disorder, a treatment supported by social security is possible. This applies, for example young women who received hormone therapy (anti-estrogen) for breast cancer or women with polycystic ovaries.
Finally, when the laser hair removal does not work, it relies on small areas in the electrolysis (a technique quite painful). That such a solution if hairs white, red or transparent laser resistant.
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