A little bit of water coming out of a woman’s nipple is called nipple discharge and needs to be judged in the context of the patient’s condition to determine if it is normal. If the patient is pregnant and her nipples squeeze out clear water, the situation is normal because the level of lactogen increases after pregnancy, which stimulates the patient’s breast to produce milk. Even if a woman does not give birth normally, but has a miscarriage or is induced in a small month, the patient’s breasts will also secrete milk after the procedure and can also produce clear water from the nipples. It is normal for women to have clear water-like discharge within 3 months after they stop breastfeeding, and in individual cases, they can also have clear water-like discharge when they squeeze their nipples again. If the patient is not in the above situation, but has clear water-like discharge from the nipple in a state where she is not pregnant, has not given birth, or has not had a miscarriage, it is not normal and is considered that she may have hyperprolactinemia and needs to have her blood prolactin level checked.