How to judge whether there is a concussion after falling on the head should be analyzed according to the diagnostic points of concussion, which has the following characteristics: 1, a brief history of coma immediately after the injury, which varies from several dozens of seconds to several minutes, and won’t last more than half an hour; 2, retrograde amnesia after the injury, that is, after the injury, you can’t recall what happened when the injury was sustained at that time; 3, cranial CT or MRI examination suggests that there is no intracranial hemorrhage, and no fracture of the skull. No fracture; 4, the patient will have headache, dizziness, nausea, vomiting, insomnia, anxiety and other symptoms; 5, lumbar puncture examination of the cerebrospinal fluid did not see red blood cells. A history of brief coma after injury is the first point in the above points that must be met to diagnose a concussion. If there is no history of coma after the injury, no diagnosis of concussion can be made.