Mammary gland hyperplasia will swell and pain, the most important manifestation of mammary gland hyperplasia is the periodic swelling and pain of the breast, often appearing or worsening before menstruation, and alleviating or disappearing after menstruation, which is not noticed by patients in mild cases, but affects life and work in severe cases. However, some patients do not have obvious cyclical changes, some and manifest as swelling and pain or pins and needles in one or both breasts, may involve the upper shoulder, chest and back, a few patients may have nipple overflow can be yellow, bloody, the course of the disease has a long time, but the symptoms will automatically disappear or alleviate after menopause. It is advisable to go to the hospital for a mammogram or mammogram to confirm whether it is caused by breast enlargement.