Effect of laser permanent hair removal on hair

1. Hair is divided into three periods: 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 line period and quiescent period of laser hair removal (7 pieces). The laser can work only after these hair turn into the growth period. Therefore, laser hair removal needs multiple treatments, and the effect can be obvious.

2. 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 number of treatment can be reduced.

3. Based on different parts of hair, there are different growth cycles, and the interval of each treatment is also different. If the head hair has a relatively short rest 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 is about 2 months.

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