Black patches on the face may be related to disease factors, age factors, life factors, etc. According to the cause of the disease, it needs to be treated by life conditioning, medication (hydroquinone cream, etc.) and other methods. 1. Disease factors: patients with eczema or skin allergies on the face, etc., after subsiding, the area will form pigmentation, usually without special treatment, in about 3 to 6 months will gradually fade. Normally, attention should be paid to sun protection to avoid aggravation of hyperpigmentation. 2. Age factor: with the gradual aging of age, the loss of water in the skin, coupled with the erosion of ultraviolet rays, will lead to the appearance of age spots and other conditions of the skin; it can be treated by fruit acid peeling, photorejuvenation and other methods. 3. Life factors: if patients are exposed to the sun under ultraviolet rays for a long time, it may lead to hyperpigmentation; minor pigmentation can be treated by applying hydroquinone cream, azelaic acid cream and other medications, and if necessary, it can be handled by pigmented cosmetic lasers and other methods. It is suggested that patients should consult the doctor in time and strictly follow the doctor’s prescription, and should not use medication by themselves.