The pain on the edge of the chest is mainly caused by costochondritis, intercostal neuritis, soft tissue injury or fracture caused by trauma. 1. Costal chondritis: mostly related to trauma, strain injury and other factors, mostly occurring in the less active, sedentary young adults, pain occurs in the 2nd and 3rd ribs, unilateral, bilateral can occur, shoulder back, armpit, cervical and thoracic pain can also occur, some patients will be swollen, coughing or hard activities when the pain is aggravated, in general, the prognosis is good. 2. Intercostal neuritis: due to infection, thoracic spine lesions, tumors, trauma and other causes of intercostal nerve injury, pain in the semi-circular band radiating along the intercostal area to the front chest or abdomen is obvious, and deep inhalation, coughing or sneezing can trigger or aggravate the pain. 3. Trauma: localized soft tissue injury or rib fracture caused by external violence, usually accompanied by swelling, obvious pain and pressing pain in the damaged area. The edge of the chest hurts when pressed, and the pain is severe and cannot be relieved for a long time, it is recommended to seek medical treatment in time.