A concussion is a type of traumatic brain injury that results in the temporary loss of normal brain function.
Concussions can be caused by a direct blow to the head, such as from falling, getting hit or being in an accident. They can also occur as a result of rapid acceleration-deceleration of the head, such as in whiplash injuries or blast injuries, like in a war zone. Many people assume that concussions involve passing out or a loss of consciousness, but this is not true. In many cases, people with a concussion never lose consciousness.
Most people will recover quickly and completely following a concussion. Some people can have symptoms that last for several weeks before gradually getting better. Some people, however, will require further treatment.
Most people recover from concussions but for those whose symptoms last more than a few days, further treatment may be needed.
There are many different types and degrees of concussions, but very few actually need surgical intervention.