A punch to the chest appears inside the pain, the most common is the local soft tissue contusion, usually are local soft tissue after the violence, resulting in subcutaneous capillary bleeding, resulting in some bruising swelling, painful feeling, but if the violence is relatively large, may also lead to the sternum or rib fracture, this situation can generally go to the hospital to check the chest film, is basically able to This can be seen. However, if the pain is deep and accompanied by chest tightness, shortness of breath and difficulty in breathing, it is necessary to determine whether there is a possibility of pneumothorax or hemothorax, because it may be caused by contusion of the lung or contusion of laceration, and this situation can also be examined by chest X-ray. However, some subtle fractures or subtle lung contusions that cannot be seen on chest radiographs can be diagnosed by CT or MRI of the chest, which basically can confirm the diagnosis.