Breast rubbing out the milk and breast water, this symptom has the possibility of breast cancer, but not necessarily breast cancer, but also can be seen physiological reasons or drug effects and other diseases. 1. Special people, such as breastfeeding pregnancy will appear breast water, water state is transparent, yellowish. 2. If the patient has recently taken some hormonal drugs, there may also be such a side effect as breast watering. 3. In the case of papilloma disease, after the capillary rupture, the nipple appears bloody overflow. At this time, you need to go to the hospital for further examination to check the possibility of breast cancer. 4. Breast cancer patients. As the disease progresses, bloody or yellowish nipple discharge may appear. Women can often do breast self-examination and go to the hospital for medical checkup when they find problems, so as to detect the disease early and treat it early.