When a two-year-old baby falls on the back of the head, the first thing to look at is whether the baby has broken the skin and swollen a big bag. If the skin is broken, you should give the baby local cleaning and disinfection care to avoid infection; if the baby does not have broken skin, but only a large swollen bag, you can generally give the baby a cold compress within 24 hours, once every 3-4 hours, and after 24 hours you can give the baby a hot compress to promote the reduction of redness and swelling. In addition, when a baby falls on the back of the head, the biggest concern is that the baby will have a severe concussion and intracranial hemorrhage, so you need to closely observe the baby’s symptoms, most of which will gradually manifest within 72 hours. Therefore, it is necessary to closely observe whether the baby has drowsiness, vomiting, especially jet vomiting, and in severe cases, there may even be performance such as seizures, when it is necessary to promptly take the baby to the hospital and improve the relevant examination.