The bruising on the chest of the patient: In this case, the bruising may be caused by the trauma to the chest, which may result in blood leakage from the subcutaneous capillaries, and the blood accumulates in the subcutaneous area of the chest. It is recommended that the patient must apply a cold compress to the chest within 48 hours of the injury, which can effectively stop the bleeding and thus reduce the area of bruising. If after 48 hours of injury, it is recommended that the patient can apply hot compresses and massage to relieve the bruising. Because hot compress and massage can speed up the local blood circulation, which can effectively improve the bruising situation. It is also possible that the bruising may be caused by the abnormal blood clotting function in the patient’s body, which may also lead to localized blood leakage in the chest. At this time, it is recommended that the patient should go to the hospital for a coagulation test, such as a blood test for the five coagulation items, to clarify whether there are any abnormalities in the coagulation function. In case of abnormalities, prompt symptomatic treatment is recommended to avoid hemorrhage due to trauma.