Concussion typically involves functional impairment of brain activities. His head CT showed no organic damage. The main clinical symptoms include transient consciousness disturbances and recent memory loss after the injury. Some patients may experience significant symptoms such as headache, dizziness, nausea, vomiting, and insomnia, among other clinical symptoms. For concussion patients, the first step is to conduct a head CT to rule out intracranial organic injuries, followed by cerebrospinal fluid examination, and then an electroencephalogram test.