Hello! If a baby who bumps his head has a concussion, most will have a mild concussion. Common clinical manifestations are vomiting, and some children have headaches. Vomiting usually lasts only 1-2 times and then does not occur again; the headache is also mild, and some children may become comatose after falling, but the period of unconsciousness is very short, generally no more than half an hour, and other symptoms are also very mild. As long as the child is allowed to Just rest for 2-3 days. If there is a scalp abrasion, disinfect it to prevent infection. If there is frequent vomiting or poor mental health, and the child is drowsy, he or she needs to be taken to the hospital to check whether he has a severe concussion or intracranial hemorrhage so that emergency treatment can be taken.