Even a small bump, bruise or cut on the head can lead to moderate to severe injury to the head. This is usually dependent on the depth of the cut or wound, fracture in the skull or internal bleeding that can damage the brain. Head injuries are also called as brain injury or traumatic brain injury (TBI) depending on the extent of head trauma. A severe head injury can lead to disability and even death. The different types of head injuries are a concussion, skull fracture, and intracranial hematoma (ICH). There are many variations in skull fracture and intracranial hematoma. The symptoms of severe head injury can range from mild to severe like a bump, nausea, headache, blurred vision to loss of consciousness, sweating, slurred speech, etc.