A traumatic brain injury (TBI) is often called the "invisible injury" because its effects are not always visible, and no two injuries are the same. This type of injury can happen to anyone, anywhere, at any time. A TBI is caused by a bump, blow, or jolt to the head or a penetrating head injury that disrupts the normal function of the brain. Depending on the severity of the injury, those who get a TBI may face health problems that last a few days or the rest of their lives.
