1. Shave the visible hairs on the surface of the skin
The laser acts like an accurate sniper, using a special bullet (wavelength) to aim at a target (melanin), while the surrounding passers-by (other tissues and structures of the skin) are not affected in the slightest.
Due to the light-absorbing properties of melanin, it is necessary to shave the hair in the hair removal area before surgery. Otherwise, the local skin will cause a burning sensation due to the absorption of a large amount of energy by the hair on the epidermis, and in severe cases, it will even cause pigmentation, which will not only increase the pain of the treatment, but also affect the treatment effect due to the less light energy absorbed by the hair follicle melanin.
After the hair is shaved, the pain will be greatly reduced during the treatment.
2. You need to complete a full course of treatment
There are some friends who may have only had 2, 3, or even only 1 treatment without completing the whole course. Will this lead to hair growth?
The answer is that it will not cause the hair to bounce and thicken, but the treatment effect will be overwritten.
Only one treatment destroys only the hair follicles in the anagen phase, and some of them are no longer able to grow terminal hairs; However, due to the limited effect of the first treatment, as time progresses, the hair follicles in the quiescent and catagen phases enter the anagen phase, and due to the safety range of laser energy, the hair follicles in the anagen phase cannot be completely destroyed during the first treatment, and it seems that the hair density will tend to be close to the original state.
Therefore, if you only have 1 or 2 treatments, and you want to continue the treatment after half a year, you still have to start from scratch.
3. Before laser hair removal, you need to do some preparations
Protect the hair removal area from the sun and use sunscreen for more than 2 weeks;
Clean the skin of the hair removal area, remove the surface oil, and shave the hair (the shaving knife is sufficient, scrape against the root of the hair, pay attention to prevent scratching);
People who are particularly sensitive to pain may be given a topical anaesthetic, such as a combined lidocaine cream, in advance.