Sudden breast pain causes, etiology more, need accurate diagnosis, common causes are as follows: 1, menstruation: women may belong to the menstruation factor, before or during menstruation, due to estrogen, progesterone fluctuations lead to breast swelling and pain; 2, endocrine disorders: sudden pain in women’s breasts, may be due to endocrine disorders leading to excessive tension, anxiety, can aggravate the degree of disorder, inducing breast swelling and pain; 3, acute mastitis: the human body appears sudden pain in the breast, may be acute mastitis; 4, other: including breast hyperplasia, cystic changes in the breast, breast tumors and other breast, breast diseases, can make the patient sudden pain in the breast.