Moles on the face are considered as pigmented nevi. It is mainly a benign skin tumor of melanocyte origin, which can be related to genetic factors, ultraviolet radiation and racial factors. 1. Genetic factors: if parents have moles on their face, the chances of the next generation having moles will increase significantly, and there are certain genetic factors. 2. Ultraviolet radiation: Long-term exposure to ultraviolet radiation may also lead to the phenomenon of moles on the face. 3. Racial factors: Some reports point out that skin color, race and other factors also affect the number of moles. Generally there is no need for treatment, but if it occurs in the part that is easy to rub, it can be surgically removed, and if there is a tendency of malignant change, it should also be surgically removed and pathologically examined.