What is laser hair removal and its principle and characteristics

Laser hair removal is based on the principle of selective photothermal dynamics. By reasonably adjusting the laser wavelength, the light beam will penetrate the skin surface and finally be absorbed by the hair follicle. By selectively absorbing the laser energy, the hair follicle will be damaged, so that the hair will lose its regeneration ability without damaging the surrounding tissues. Plastic experts adjust the laser to a specific wavelength to pass through the epidermis. The effect of laser hair removal is irreversible due to the endothermic necrosis of hair follicles. Therefore, laser hair removal or photons can achieve a long-term hair removal effect.

Principle and characteristics

The use of cooling system can effectively protect the skin from laser burns throughout the whole process

Laser hair removal treatment will not produce pigment precipitation on the skin surface after hair removal as the traditional hair removal method. This is because the skin absorbs less laser during laser hair removal treatment.

The best wavelength is used for treatment: the laser can be fully and selectively absorbed by melanin, and the laser can effectively penetrate the skin to reach the position of hair follicles. The effect of laser is effectively reflected in the heat generated on the melanin in the hair follicle for hair removal.

For the best hair removal effect, the laser pulse time required is related to the thickness of the hair. The thicker the hair, the longer the laser action time is required. It can obtain the ideal effect without damaging the skin.

Hair effects

Based on different parts of the hair, there are different growth cycles, and the interval of each treatment is also different. If the hair on the head has a relatively short resting period, the interval can be as short as 1 month; The hair rest period of trunk and limbs is relatively long, so the treatment interval should be about 2 months, so you can easily enjoy the confidence brought by silky skin.

Hair can be divided into three periods, namely, growth period, degenerative period and quiescent period. The energy emitted by the laser instrument can only destroy the hair follicles in the growth period, and has no obvious effect on the hair in the degenerative period and quiescent period. Only after these hairs turn into the growth period can the laser work. Therefore, photoinduced hair removal requires multiple treatments, and the effect can be obvious.

If the proportion of a certain part of hair in the growth period is small, the number of treatments should be increased. On the contrary, the treatment times can be reduced.

If the hair follicle density of a certain part is too high, the laser energy should be appropriately reduced during treatment.


The laser depilation light pulse time is adjusted to protect the epidermis and remove hair of different thickness at the same time.

The advantage of laser hair removal is that the hair removal is very thorough. The laser can penetrate into the deep layer of dermis and subcutaneous adipose tissue, act on the deep hair follicles in different parts, and effectively remove the deep hair in any part of the human body.

The advantage of laser hair removal is its high speed.

The advantage of laser hair removal is that it will not damage the epidermis.

The advantage of laser hair removal is that the pigmentation after hair removal is very close to our skin.