Nipple extrusion yellow water and menstruation has no relationship, may be the patient suffers from breast hyperplasia, mastitis and other factors caused by the patient is recommended to go to the hospital in a timely manner to check the mammary gland, follow the doctor’s instructions for treatment. 1. Breast hyperplasia: It is a common benign breast disease, mainly related to endocrine disorders, estrogen and progesterone ratio imbalance leads to breast hyperplasia. The main manifestation of breast pain, nodules, nipple discharge and other symptoms, the patient nipple extrusion yellow water, is caused by breast enlargement. 2. Mastitis: inflammation of the breast tissue with or without microbial infection, the patient nipple extrusion of yellow water may be infected with pus, accompanied by redness, swelling, pain, local skin fever and other symptoms. In addition, you should avoid spicy, cold, seafood and other stimulating food, drink more water, pay attention to rest, pay attention to local hygiene and cleanliness.