The baby fell from the bench to the back and head, after two hours suddenly vomiting, do not rule out the possibility of concussion or cerebral hemorrhage due to the fall, should be promptly sent to the hospital pediatrics. 1. Concussion: Concussion is a mild brain injury caused by trauma to the brain, and the patient may have headache, vomiting and other symptoms. If the concussion is mild, no special treatment is needed. If the situation is more serious, it is necessary to use sedative and analgesic drugs under the guidance of doctors. 2. Cerebral hemorrhage: Children with cerebral hemorrhage may have headache, accompanied by vomiting, dizziness and change of consciousness. Due to the different location and amount of bleeding, conservative treatment or surgery should be adopted under the guidance of doctors. Children who vomit after a fall should be taken to a pediatrician in time to avoid life-threatening injuries.