In women who have given birth, 2-3 years after breastfeeding, a milky white fluid, similar to milk, may appear in the nipples, without any symptoms of breast pain or discomfort, which is mostly normal. If a woman who has not had children can squeeze out milk, mostly with irregular menstruation, the possibility of pituitary microadenoma should be considered and a blood test may be performed. If serum prolactin is significantly outside the normal range, further MRI of the pituitary gland may be done. If there is more lotion, brown or bloody discharge, and it is accompanied by nipple pain and lumps, it may be due to dilated milk ducts or even breast masses. It is important to have a timely mammogram and, if necessary, a mammogram to facilitate the detection of the condition and active treatment to avoid aggravation. Nowadays, the incidence of breast diseases is very high, it is best to have annual breast examinations to enable early detection and treatment when diseases exist.