A small amount of white or colorless clear fluid in the breast is a normal phenomenon. The breast is a secretory organ and a small amount of secretion will be discharged through the milk ducts, so this small amount of white or colorless overflow is considered to be normal breast secretion and is a normal condition, so pay attention to keeping the area around the nipple clean and hygienic. If there is a small amount of yellow, yellowish or yellow-green overflow in the breast, inflammation in the breast ducts is considered. If it is accompanied by localized pain in the breast, try to go to the hospital and have a mammary ductoscopy, as this kind of overflow is not normal. In addition, if there is a small amount of red or brown bloody overflow, it is necessary to consider the case of papilloma in the milk ducts or even breast cancer, which is also abnormal. It is recommended to go to the mammography department of a regular hospital in time to check and confirm the specific cause before treatment.