At present, laser is the most common treatment for hair removal, and the most concerned problems are as follows:
- What is laser hair removal?
The principle of laser hair removal is based on the selective photothermal effect, using a certain wavelength of laser to reasonably adjust the pulse width and energy density, and pass it through the skin surface to the root hair follicle. The light energy is absorbed and transformed into the heat energy that destroys the hair follicle tissue, so that the hair loses its regeneration ability. Laser hair removal is a safe, fast and long-term hair removal method.
- Take it off once, is it effective?
Laser hair removal generally needs many times to remove the hair. There are two reasons: first, most hair follicles are tied together in groups of three and open in the same pores. A hair in the pores is the hair growing from one of the three hair follicles in a group below it, so one treatment can only destroy one hair follicle in a group; Second, hair growth should go through the growth period, degenerative period and resting period. Laser hair removal in the growth period is 75% effective, the degenerative period is 25%, and the resting period is almost invalid.
- Does depilation affect perspiration?
Perspiration mainly depends on small sweat glands, and the opening of small sweat glands is not in hair follicles. Laser hair removal destroys hair follicles and does not damage sweat glands, so it does not affect human metabolism and perspiration.
- Can permanent hair removal be achieved?
After laser treatment, the average reduction of each time is 20% ~ 30%. Generally speaking, after multiple laser treatment, the hair clearance rate can reach 95%. Of course, its curative effect is affected by many factors, and the current technology can not successfully permanently remove white hair and fine hair.
- Is laser hair removal harmful to the skin?
Because there are many melanins in hair follicles, it can preferentially absorb a large amount of laser energy and finally convert it into heat energy, so as to increase the temperature of hair follicles and destroy the function of hair follicles. In this process, because the skin does not absorb laser energy, or absorbs a small amount of laser energy, the skin itself will not be damaged when selecting appropriate energy parameters.
- Will the hair get darker and darker?
After laser treatment, the remaining hair will become thinner and lighter. However, for people who use these methods for a long time, their hair will gradually become thicker, harder and darker.
- Is the depilation effect the same for all people and all parts?
The effect of depilation is closely related to the number of treatments, the type of skin, the thickness and color of hair and the treatment site. Generally, the whiter the skin color, the darker and thicker the hair, the better the depilation effect.