Because of genetic reasons, some people have heavy facial sweat hair, which in turn affects the beauty of appearance, some people like to use hair removal methods to deal with, such as hair removal cream, laser, etc.. However, if these methods are not used properly, it may lead to some hazards, as follows: 1, pigmentation: the reasons include two: (1) post-operative sun care is not in place, the skin is exposed to ultraviolet radiation and lead to pigmentation; (2) because of photon hair removal instrument operation errors, causing skin burns lead to pigmentation; 2, facial blister: laser in the same part of the stay too long, it is easy because of energy too much and cause blistering, therefore, it is recommended to choose treatment institutions and doctors carefully when doing full face hair removal; 3.Facial red spot: it is usually caused by improper use of the photorelaser hair removal instrument, which is a manifestation of facial burns; 4.Bacterial infection: especially the sweat hair on the upper part of the lips belongs to the danger triangle, if there is bacterial invasion or infection, it may affect the health of the whole body.