There are five possible cases of chest pain: 1. chest wall injury, with a clear history of trauma, external force acting on the chest wall, causing acute inflammatory injury to the chest wall, with pain and redness and swelling, and the pain can increase when pressed. 2. intercostal neuritis, which is a sterile inflammation, can have a clear site of pain, and the pain does not change significantly when pressed. 3. cystic hyperplasia of the breast, which is one of the common breast diseases in women. The pain is mostly aggravated before menstruation and relieved after menstruation. 4. Acute mastitis, an acute purulent infectious lesion of the breast tissue, is characterized by red, swollen, hot and painful breasts, with fluctuating lumps palpable on pressure and accompanied by severe pain. 5. Women in physiological or pubertal development, due to endocrine hormonal changes, cause interstitial breast edema, breast The swelling and discomfort, and the pain increases when pressed, do not require special treatment.