Aunt i.e. menstruation, breast swelling and pain after menstruation, on the one hand, it may be caused by high hormone level in the body, on the other hand, it may be caused by pathological breast diseases, such as lobular hyperplasia of the breast or mammary fibroids. Before menstruation, estrogen and progesterone increase in the body, prompting breast lobular hyperplasia and ductal development, breast swelling, pain, some women will continue until menstruation, after menstruation, most people will disappear. Breast lobular hyperplasia or fibroma, patients in addition to breast swelling and pain during menstruation, still feel breast pain after menstruation is clean, the symptoms may be more obvious during menstruation. The breast swelling and pain occurs because of the hyperplasia of one’s own breast lobules. Fibroid tumors in the breast, will feel the nodular tissue. If you find this situation, you need to go to the breast department of the hospital for further examination and treatment.