Traumatic brain injury is a complex injury. It is different and more complicated as compared to other traumatic conditions. As brain is central control system of the body the damages caused by brain injury can be fatal. Its complexity can be understood by the fact that no two brain injuries are alike, and there consequence may not appear from weeks to months. Its severity can range from unconsciousness for less than 30 minutes (mild brain injury) to loss of memory (severe brain injury).