The pain in the chest may be caused by the following reasons: 1. It may be caused by aseptic inflammation of the sternum and the cartilage between the ribs, or it may be caused by costochondritis, both of which usually have local pressure pain that is very obvious, and if the local inflammation is strong, there will also be local flushing of the skin, increased skin temperature and other symptoms of redness, swelling and pain. 2. After the chest is bruised, crushed injury, resulting in local soft tissue contusion and formation, will see the situation of subcutaneous bruising, because the subcutaneous capillaries appear rupture bleeding after the local swelling pain, in deep breathing, thorax force to take things, there will be local pain, rest for a period of time external ointment, the symptoms will slowly improve.