The nipple is the opening place of many breast ducts, and the ducts are connected to the lobules of the breast, so the small amount of water may be normal, if there is no discomfort, you can observe for a period of time, you can do self-checking, palpation of the nipple with or without lumps, without palpation of lumps, you can do endoscopy of the breast duct, and do smear for nipple discharge. Cytologic examination can basically confirm the nature of nipple discharge. When the infection in the breast duct can also squeeze out the liquid, through the breast duct endoscopy can confirm the diagnosis of the infection in the breast duct, do the breast duct irrigation can be treated, if the nipple overflow and can touch the lump under the nipple, need to do ultrasound examination, to rule out the symptom of the papilloma in the breast tube, usually need to pay attention to do a good job in nipple cleanliness and hygiene, try to maintain a clean and dry, and found that nipple overflow, try to go to the Hospitals to confirm the diagnosis.