There are two basic types of brain injuries. In open head injuries, the skull is fractured. A closed head injury does not involve a skull fracture, but these injuries can be even more serious than open head injuries because the brain may swell, or blood clots may form under the skull.
Brain injuries can cause many complications even when the victim appears outwardly healthy. Symptoms of complications you should be alert to and take seriously after you have sustained a head injury include: