A 2 year old baby’s head fell a big bag, this situation is often encountered, is trauma caused by the local capillary rupture, bleeding after the bruises gathered in the subcutaneous, the formation of the scalp hematoma. In order to reduce the swelling as soon as possible, you need to immediately give the child a local cold compress on the bulging area, you can use a cool towel or ice, which can play a good role in stopping the bleeding and swelling, reduce the local bleeding. 48 hours later, you can use a hot water bag or hot towel local external compresses to promote the local bruising dissipation, hematoma absorption, 3-5 days, at most a week hematoma can be completely absorbed. If the hematoma continues to increase in size, it may be necessary to perform a puncture to extract the hematoma or even an incision and drainage. The child should also be allowed to avoid strenuous exercise, reduce crying and rest in bed to avoid rebleeding and hematoma enlargement. The child’s mental status should be closely observed. If coma and repeated vomiting occur, the child should go to the hospital for a cranial CT examination as soon as possible to clarify whether there is intracranial hemorrhage or skull fracture, and if necessary, hospitalization is required.