Young women should maintain a healthy lifestyle, including a healthy diet, a more optimistic spirit, artificial breastfeeding for women with children, etc. A healthy lifestyle is very important to prevent breast cancer. Self-examination, in addition to hospital examination, includes doctor’s experience and related auxiliary examinations, such as mammography and ultrasound. This is very helpful for breast cancer prevention and early detection and early treatment. Five causes of RF pain: Cause 1: If RF pain is episodic and often starts before menstruation or worsens before menstruation, and can be relieved or disappears after menstruation, the pain is distension or pins and needles, sometimes involving the ipsilateral axilla or back of shoulder, with mild to moderate local tenderness, then it is considered to be a hyperplastic lesion. Cause 2: Generally speaking, if there is sudden, persistent and severe pain in the RF, accompanied by obvious tenderness, it is considered to be various acute infectious diseases in the RF; if there is local throbbing pain, it is possible that the local area has become septic. Reason 3: If the RUTOY pain is severe during breastfeeding, RUTOY broken and cracked, it may be the RUTOY chaps caused by the sucking and biting of the RUTOY by the breast. If the RF pain is only mild vague or dull pain, episodes without obvious regularity, only occasional or paroxysmal, some for persistent, because the pain is not obvious and often ignored, know that such RF pain may also be a sign of early RF malignant disorders, should be given sufficient attention. Reason 4: Even sometimes, RF is not obvious pain, and only one side of the armpit or shoulder back pain, there is the possibility of malignant lesions, these subtle changes should not be easily spared. If there is severe persistent burning pain in the RF, progressive aggravation, difficult to relieve themselves, and accompanied by local masses break necrosis or surgical incisions and surrounding skin breakdown, the RF pain for advanced malignant lesions, at this time, because the signs and symptoms of other malignant lesions are well understood, to find the cause of pain is not difficult. Cause 5: Some women also have RF pain when distended milk, which is a physiological situation, should pay attention to differentiate from RF pain caused by disease.