Children who fall down concussion can appear transient coma, retrograde amnesia, as well as headache, dizziness, nausea and vomiting and other symptoms. 1. Transient coma: transient coma is a relatively common clinical symptom, generally speaking, the time of coma is more than 5 minutes, less than half an hour, and most of the cases are able to wake up by themselves. 2. Retrograde amnesia: retrograde amnesia is relatively more characteristic, that is, forgetting the first few minutes or seconds before the injury occurred, many people will not remember the whole process of injury. 3. Headache, dizziness, nausea and vomiting: headache, dizziness, nausea and vomiting are very common clinical symptoms, and most of the children will have this performance. It is recommended that patients who have fallen should seek medical attention in time, so that the doctor can determine whether it is a concussion and take appropriate treatment measures according to the patient’s clinical manifestations and examination results, and should not be negligent and make judgment on his/her own.