Yellow discharge on the nipple may belong to the normal phenomenon, but do not rule out abnormal situations. 1. Normal phenomenon: some women are in pregnancy or breastfeeding, due to the body’s prolactin secretion increases, will make the nipple yellow secretion, this is usually a normal phenomenon, if there is no other discomfort symptoms, do not need special treatment. 2. Abnormal situation: If a woman suffers from mastitis, due to the stimulation of inflammation, it may also lead to yellow discharge from the nipple, and there are usually symptoms of redness, swelling, heat and pain. 3. In addition, if a woman suffers from breast tumors, such as breast cancer, intraductal papilloma, it may also lead to yellow discharge from the milk ducts. Women with yellow discharge from the nipple are advised to actively go to the regular hospital for relevant examinations to find out the specific causes, and then targeted to adopt the appropriate solutions to avoid delays in the condition.