Skin nevus is a general term which mainly refers to blue nevus, pigmented nevus or skin tunica, the removal methods of different moles are differentiated, mainly physical therapy and surgical therapy. 1. Blue nevus is a benign proliferative tumor of the skin, which can be seen at any age. Most of the moles will not be malignant, due to the deep location of moles, it is difficult to see the effect of ordinary treatment, and there is an aesthetic need to do surgery to remove moles. 2. Pigmented nevus is a very common skin tumor, most people have one or more. Smaller size, less than 5mm in diameter nevus can be treated with laser, electrocautery or freezing, more than 5mm in diameter need to be treated with surgery. 3. Skin tags tend to grow in moist and warm areas, such as the neck, armpits, and groin. Skin tags can be treated with physical therapy such as laser, electrocautery or cryotherapy. Keeping the body dry and breathable can reduce the appearance of skin tags, and patients with diabetes should actively control their blood sugar. There may be other causes of skin nevus, it is recommended to go to the hospital in time, identify the causes and treat the symptoms.