When breasts become bigger and painful, we need to take into account the time, period and degree of symptoms to determine the measures to be taken. First of all, if you are in the period of growth and development, the symptoms of breast enlargement, pain or swelling are mostly normal, you only need to choose the material of underwear wisely, wear loose fitting clothes and maintain a good body posture. Secondly, if the breasts in special physiological period, such as the cycle of breast enlargement and pain before and after the vacation, or during pregnancy, such symptoms, as long as there is no obvious hard lumps inside the breasts, generally normal, to be special physiological period will naturally recover, during the period of attention to the care of the breasts. Furthermore, if the breasts are enlarged for a long period of time, accompanied by pain, or even have lumps or abnormal fluid coming out of the nipples, then you need to be alert to breast diseases. You should go to the breast department of the hospital immediately to consult a professional doctor and undergo breast ultrasound, molybdenum target and other related examinations to detect the disease as early as possible and get proper treatment as soon as possible.