When the forehead touches the big bag, first go to the hospital to check the head CT, to see if there are obvious depressed fractures and intracranial hematoma, if there are these cases, need to be hospitalized; if there are no such cases, it is recommended to first cold compress the big bag with cold towels, you can interval cold compress every half an hour, after 24 hours change to hot towels hot compress, again interval half an hour. At the same time, Yunnan Baiyao or safflower oil can be applied to the large pouch to promote the absorption of the subcutaneous hematoma and reduce the swelling. If there is skin breakdown on the surface of the pouch, oral antibiotics can be administered as a preventive measure. Remember not to press or puncture the subcutaneous hematoma to prevent infection.