Chest mole is a common type of benign tumor, which has no obvious effect on the body. The main methods of treatment are surgical excision, cryotherapy, laser therapy, etc. Generally, patients can be cured after surgical excision. Skin moles are prone to malignant changes due to frequent friction, irritation and ultraviolet irradiation, and should be surgically excised as early as possible to prevent the disease from occurring in the first place. If a skin mole suddenly grows faster, has an unclear border, dark color, unevenness, ulceration, rough surface and other symptoms, it is a precursor of malignant change of the skin mole.