Generally speaking, hair growth on moles indicates that the pigmented mole is mostly benign. If the pigmented mole has malignant lesions that invade the surrounding tissues and destroy the local normal structure, including the local hair follicle structure, the hair on the mole will fall off instead. Therefore, the hair on the mole may be benign lesion or malignant lesion. 1. Benign lesions: Hair growth on top of a mole is caused by cell mutation, which means that there are hair follicles on the surface of the mole, and hair will grow if there are hair follicles, and if the nutrition and metabolism of the mole cells are good, the hair that grows out will become longer and thicker. Hair growing on top of a mole is a form of nevus. A mole is caused by more basal melanocytes and is a benign lesion, such as a nevus nigra. Usually, the hair on the mole is relatively more stable, and the probability of malignant changes is lower. 2. Malignant lesions: Hair on the mole does not exclude the possibility of malignancy, especially when there is hair on the mole, and hair loss occurs in a short period of time, if accompanied by tingling, itching and other sensory abnormalities, or small satellite foci around the mole, all suggesting that malignant lesions are possible, and it is necessary to go to the hospital in a timely manner to consult the doctor, to determine the nature of the need for surgical excision of tissues to do pathology testing. Moles with hair on them, if occurring on the face, will affect the beauty of the face, can be removed by laser, freezing and surgery and other treatments. After removing the mole, you should pay attention to good wound care, and when the wound scabs, avoid tearing off the scabs with your hands, so as to avoid secondary infections, etc., which may lead to scars. Hair growing on top of the mole affects the aesthetics, especially when accompanied by occasional tingling, itching and other sensory abnormalities, you need to go to a regular hospital in time for consultation and treatment.