concussion contusion hematoma skull fracture

Types of Traumatic Brain Injuries (TBI)

The four main types of head injuries are:

  • Concussion: a mild brain injury that is usually temporary.
  • Contusion: a bruise on the brain.
  • Fracture: broken skull bones.
  • Hematoma: a blood clot caused by a blow to the brain.

The head and brain can be injured whether or not the skull is actually damaged. A hard knock or jolt, even with no external sign of injury, is enough to cause a brain injury.