Nevus is known as pigmented nevus in medicine, most of the causes are not known, some of them are related to heredity or developmental defects, and can be removed through surgical treatment, physical therapy and other ways. 1. Surgical treatment: for those without cancer or uncomfortable symptoms, there is no need to intervene in the treatment, and attention can be paid to observation; for those with cosmetic needs or cancer, treatment can be carried out through surgical excision, and pathological examination can be carried out. 2. Physical therapy: smaller lesions can be treated by cryotherapy, laser therapy and other ways of physical therapy, so as to achieve the purpose of removing the nevus. The long nevus on the face caused discomfort suggests timely consultation, follow the doctor’s instructions to deal with. Pay attention to skin protection, actively cooperate with the doctor’s treatment, pay attention to observe whether there are ulcers bleeding and other abnormalities in life, once there is an abnormality timely medical treatment.