Concussion is usually defined as “temporary dysfunction of the central nervous system”, which is generally a transient loss of consciousness, followed by wakefulness, with proximal amnesia, no significant changes in the pathological anatomy of the nervous system, no organic damage, and transient neurological changes. Through the definition we can understand several points of concussion diagnosis: 1. head trauma, transient loss of consciousness, often seconds or minutes, usually not more than half an hour; 2. retrograde amnesia, inability to accurately recall the injury or even the delivery to the hospital; 3. physical examination and examination are negative, but there can be symptoms of head discomfort. Therefore, we often see patients with head trauma in the emergency room, and they give themselves a diagnosis, “Doctor, I have a concussion, right?” Are all patients with head injuries “concussions”? That is not necessarily the case. Only in strict accordance with the diagnostic criteria, through careful questioning of medical history and improvement of various examinations, can we achieve clear diagnosis and appropriate treatment in clinical work, and ensure clinical treatment effect and medical safety.