The bone in the middle of the chest is called the sternum, which consists of the sternal stalk, the sternal body, and the trochanter. Since the sternum is a rectangular bone located in the middle of the chest, it is more susceptible to external forces, especially during fights and brawls. If a fracture of the sternum or a soft tissue injury occurs, the patient will experience pain in the middle of the chest, pain when breathing, as well as redness, swelling and subcutaneous bruising. Patients can choose to apply cold compresses to the painful area within 48 hours of the injury to reduce inflammatory exudation, three times a day for 10 minutes each time, and after 48 hours, they can choose to apply hot compresses. If the pain is more intense, it is recommended to go to the hospital for further consultation to investigate whether a fracture has occurred through X-ray.