Traumatic Brain Injuries can occur when an external force impacts the head or body, during which the brain undergoes trauma and may have resulting changes to brain function. Warning signs of a TBI with immediate risk to life (such as brain bleeding) include one pupil being larger, drowsiness or inability to wake up, worsening headache, slurred speech, vomiting, nausea, unusual behavior (confusion, agitation, restlessness), or loss of consciousness. (Courtesy Graphic)