General objective of this article is to explain cause of Head Trauma Injury. Danger of brain damage is dependent upon the extent of the head trauma injury. Some incidents for example falling from a excellent height, high speed auto accidents, vigorous shaking, being hit by way of sharp, heavy or high speed object use a higher risk of severe brain injury in comparison with being hit by a new soft, blunt object, falling at a low height or being inside a slow speed car accident. Here also briefly analysis symptoms of Mild Traumatic Brain Injury and symptoms of Severe Traumatic Brain Injury.