A concussion is a traumatic brain injury involving temporary loss of brain function. It is caused by a direct blow to the head, face, or neck that applies force to the brain within the skull.

Symptoms of concussions usually resolve spontaneously and in a relatively short amount of time, between 7 and 10 days. Concussions do not always result in a loss of consciousness, and there are usually more subtle symptoms associated with the condition, which include headaches, confusion, nausea, amnesia, irritability, cognitive impairment, and many more.

Early medical attention and treatment for concussions is crucial, because it can prevent long-term effects of concussions from becoming serious. Rest for the brain is important so it can heal. Severe cases may call for surgery.