Vomiting in a child immediately after a fall on the head may be caused by concussion, traumatic intracerebral hematoma, and so on. When the baby is vomiting, the head should be tilted to one side to avoid the vomit blocking the airway leading to asphyxiation, after which the baby should be admitted to the hospital immediately to find out the cause. 1. Concussion is a common craniocerebral injury, which often manifests itself as impaired consciousness, headache, vomiting and other symptoms. After seeking medical attention, the main focus is on rest, usually 2 weeks to return to normal. 2. Traumatic intracerebral hematoma: when it occurs in the frontal lobe and temporal lobe, it can also cause symptoms of vomiting, once diagnosed, early surgical treatment. The symptoms of vomiting after brain injury in children should immediately go to the hospital, complete the relevant examinations such as cranial CT, etc., to clarify the cause of the disease, and symptomatic treatment under the guidance of the doctor, so as to avoid delaying the condition.