10-month-old baby sitting back knocked the back of the head should pay attention to observe the baby’s performance, if there is bleeding trauma, confusion, repeated vomiting, etc. need to promptly seek medical attention. After the baby knocked on the back of the head, parents should try to talk to the baby more, divert its attention, soothe its emotions, but try not to let him fall asleep, which will affect the judgment of the baby’s state of consciousness. If the baby is hit to the back of the head and there is a mass but no traumatic bleeding, local cold compress should be applied within 24 hours to make the local capillaries contract and reduce the formation of hematoma, and pay attention not to put the ice bag in direct contact with the skin, and add gauze between the ice bag and the skin to prevent frostbite. hot compress should be applied after 24 hours to promote the accelerated absorption of subcutaneous hematoma. Babies with hemorrhagic trauma, unconsciousness, repeated vomiting, bleeding and fluid in the nose or ears may have intracranial hemorrhage caused by impact, etc. They should go to the hospital to take a cranial CT, and be treated with anticonvulsant (e.g., phenobarbital, etc.) and intracranial pressure lowering (e.g., mannitol, etc.).