The forehead fell a bag first to the hospital’s emergency room, perform cranial CT examination, to rule out intracranial bleeding, skull fractures or not. If no abnormality is found in the cranial CT examination, it is a simple scalp hematoma and there is no need to worry. Apply cold compresses with ice within 24 hours after the injury to reduce bleeding, and apply hot towels and massage after 24 hours to promote the absorption of the hematoma, which will be absorbed by itself in about 2-3 weeks. If the hematoma is not absorbed for a long time or the area is too large, after the hematoma is completely liquefied, the hematoma can be aspirated by puncture and wrapped with pressure, and the hematoma will be slowly eliminated.