The main reasons for nipple pain before menstruation are as follows: First, it is considered to be a disorder of hormone levels in the body, endocrine disorders stimulate the breasts, and the formation of nipple pain symptoms, is a normal physiological reaction, can not be treated, some women before the onset of menstruation will appear this symptom, and there may be dizziness, headache, drowsiness and other symptoms. Secondly, it is considered to be a disease such as breast enlargement or mastitis, which can lead to nipple pain and may be accompanied by other symptoms, so it is best to observe the physical condition. Third, it may also be caused by other diseases, such as malignant tumors, but other systemic diseases can not be completely ruled out, if the pain is more powerful, it is best to go to the hospital in time for breast CT examination, usually can be appropriate massage breast, pay more attention to rest.