Typical features of a concussion include a brief loss of consciousness and forgetfulness of recent events. The loss of consciousness of a concussion usually lasts from a few minutes to several minutes, and some patients may also experience amnesia, which is the inability to remember what happened at the time of the injury or in the recent past before the injury. Other symptoms include dizziness, headache, nausea, vomiting, ringing in the ears, cold sweats, photophobia, and memory loss, but the symptoms usually subside over time. Concussions usually occur after head trauma or impact, and patients who have suffered a more serious head injury should seek medical attention as soon as possible to avoid delays in treatment. Concussions can be prevented on a daily basis, with good safety precautions on daily trips, such as wearing a helmet and fastening a seatbelt, paying attention to anti-skidding for elderly patients, and using walking aids to avoid head impacts. It is recommended that patients have discomfort, timely consultation, do not be negligent, so as not to delay the condition.