There are three main possibilities for breast pain and enlargement, as follows: 1, women in the growth period or physiological period, estrogen increase leads to breast parenchymal hyperplasia, interstitial congestion, edema, presenting breast enlargement and tingling phenomenon, no special treatment; 2, acute mastitis, common in lactating women, for acute purulent infection of the breast lesions, manifested as the overall breast congestion, edema, accompanied by severe pain. 3, cystic hyperplasia of the breast, mostly seen in women of childbearing age 30-50 years old, is a common type of benign breast lesions, when the acute attack can appear breast swelling, accompanied by hyperplastic nodule-like changes, and pain and menstrual cycle. When breast enlargement occurs and physiological causes can be ruled out, you should go to a regular hospital for breast surgery or general surgery to get a clear diagnosis and early treatment.