Moles on the face may be caused by genetic mutations during development, ultraviolet radiation and so on.
1. Gene mutation: It may be related to gene mutation. During embryonic development, melanocytes are retained in the dermis due to obstacles in their migration from the neural crest to the epidermis, leading to the appearance of nevi.
2. Ultraviolet radiation: moles on the face may be caused by ultraviolet radiation. Ultraviolet radiation directly irradiates the skin, causing damage to the skin, and subcutaneous melanin gathers, leading to the production of moles.
It should be noted that moles on the face generally do not need treatment, if you think it affects the beauty or has the tendency of malignant change, you can go to the hospital and ask the doctor to diagnose and treat it accordingly.