Prolactin level can be elevated due to physiological, pathological and pharmacological factors, and if it is higher than 200 μg/L, it is considered serious and highly suspicious of pathological diseases. 1. Physiological factors: Prolactin secretion is caused by the increase of estrogen in women’s body, so prolactin may increase during menstruation and pregnancy, and prolactin will also increase when breastfeeding after delivery due to sucking of nipples by infants and young children, which is a normal physiological phenomenon, and the level of prolactin will not be more than 100 μg / L in general. 2. Pathological factors: If the prolactin level of a woman exceeds 200μg/L, there is a high suspicion of lesions in the hypothalamus or pituitary gland, which requires a combination of clinical examination and pituitary imaging. 3. Pharmacological factors: If a woman has recently taken chlorpromazine, haloperidol and other drugs, it will affect the secretion of the pituitary gland, resulting in increased prolactin, which can be stopped and observed for a period of time. It is recommended that patients with increased prolactin follow the doctor’s follow-up treatment, no unauthorized use of drugs.