There is no complete definition of a good or bad red mole on a woman’s breast. If a red mole on the breast is a benign mole, it usually does not affect the health of the body, but if a red mole on a woman’s breast is a malignant mole, it may affect the health of the body. This phenomenon is usually caused by spider nevus, skin pigmentation, senile hemangioma, allergic papules and other reasons. 1. Spider nevus: According to current research, it is mostly related to hormones. Spider nevus can be normal or caused by liver disease, and should be examined to confirm the diagnosis. 2. Skin pigmentation: it can be congenital or acquired, most of them are benign, if it increases suddenly in a short time, or pain or itching occurs, it is necessary to guard against malignant changes and actively go to the hospital for treatment. 3. Elderly hemangioma: it is a manifestation of skin aging, with no symptoms, clear boundary, slightly protruding from the surface of the skin, and does not need to be treated. If the hemangioma is bigger, it needs to be removed by surgery or laser. 4. Allergic papules: due to contact with poor-quality clothing skin allergies, you can stay away from allergens, active anti-allergy treatment. Women with red moles on their breasts need to pay close attention to the size of the red moles, and need to go to the hospital in time for examination to understand the nature of the moles, and have the doctor choose a targeted program according to the individual situation for treatment. Women who have no obvious changes in red moles need to do a good job of skin care work, try to avoid picking the red moles on the chest with their hands, so as to avoid skin damage caused by infections and other undesirable symptoms.