Pigmented nevi are the most common benign skin tumors and can be classified as intradermal nevi based on histopathology. Mixed nevus. Interdermal nevus (most prone to cancer). Pigmented nevus can occur in any part of the skin, but it is more common in exposed areas such as face, which affects the beauty and is prone to cancer and hinders health. Therefore, a reasonable treatment plan should be formulated according to the type, size, location, and signs of malignancy of pigmented nevus and the patient’s motivation for treatment. The treatment of pigmented nevus can be generally divided into two categories: surgical and non-surgical. Surgical treatment can be applied to any type of pigmented nevus, and pathological examination can be performed at the same time as the treatment of choice. For small pigmented nevus, straight suture excision can be performed and the scar is not obvious after treatment. Secondly, if the area is larger or the site is special and there is no sign of malignant transformation, staged excision and skin soft tissue expansion are feasible, and as far as possible, no skin implantation will be done, which will affect the beauty after healing. (Staged excision is preferred.) Third, if the following malignant signs appear, excision or expanded excision should be performed in a timely manner: 1, sudden increase in volume 2, deepening of color 3, surface erosion, ulceration, swelling, recurrent infection 4, self-perceived pain or pruritus 5, satellite lesions around. If the excision area is large and cannot be directly sutured, adjacent flap transfer or skin grafting is feasible to repair the wound. Non-surgical treatment has the advantage of avoiding the pain of surgery, but the indications are more limited and can be applied to smaller and superficial nigra. Commonly used methods include laser, freezing, etc. However, repeated physical and chemical stimulation can easily induce pigmented nevus cancer, and those who are not completely treated by this method should be removed and sent for examination in time. In general, the treatment of pigmented nevus should adhere to the principle of “if it is not treated, it should be treated completely”.