808 semiconductor hair removal refers to the use of 808nm wavelength semiconductor laser to heat the melanin in the hair follicle area and destroy the hair follicle to achieve the purpose of permanent hair removal. Although the effect of this way is better, but it can also bring the following hazards: 1.painful feeling: it may cause the stinging feeling in the treatment area, because hair removal relies on the heat of light energy to heat energy to damage the hair follicle, and this effect will involve the nerve of nociception, which leads to a slight local stinging feeling; 2.facial red spot: this is a kind of facial burn performance, which is usually caused by the improper use of the instrument of hair removal, but if the 3.Local pigmentation: Since laser irradiation will cause local inflammation, post-inflammatory pigmentation may occur; 4.Depigmentation: Since 808 laser mainly heats melanocytes in the hair follicle area, it is easy to cause the destruction of melanocytes and produce depigmentation, or even local white spots; 5.Local blistering and scarring The 808 laser can cause local blistering and scarring because of the sensitivity of the skin.