The child fell head swollen a bag, generally belongs to the subcutaneous hematoma, if the child’s general condition is good, you can take the cold compresses to reduce the swelling, etc., but if the child has a craniocerebral injury, immediately seek medical attention. A child’s head swollen after a fall is a soft tissue hematoma of the scalp. If the child is in good condition at this time, the skin around the hematoma is intact without ulceration, can be wrapped in a wet towel cold compresses for 72 hours, to reduce blood exudate, promote the absorption of hematoma. Generally smaller hematoma, 1 ~ 2 weeks time can be completely absorbed, larger hematoma time is relatively long. If the child is in poor condition after the fall, showing obvious dizziness, headache, vomiting, pallor, crying, etc., it is considered that there may be craniocerebral injury, intracranial hemorrhage, intracranial fracture, etc., and the swelling can not be reduced simply. It is necessary to immediately go to the regular hospital, improve the cranial CT, targeted treatment.