Traumatic Brain Injury

Traumatic brain injury, or TBI, occurs when an external force injures the brain. It may follow a direct blow to the head, rapid acceleration-deceleration, a fall, a traffic collision, sports injury, or penetrating trauma. The severity ranges from mild forms, including many concussions, to life-threatening brain injury requiring urgent intensive care. ^[1][2][3]

Symptoms may appear immediately or evolve over time. Common problems include headache, dizziness, nausea, vomiting, confusion, memory difficulty, light sensitivity, balance problems, irritability, and excessive sleepiness. In more serious injury, people may develop worsening headache, repeated vomiting, seizure, weakness, speech difficulty, unequal pupils, loss of consciousness, or increasing confusion. ^[1][2]

Concussion is often considered a mild form of traumatic brain injury, but not every TBI is mild. Even when a person remains awake, symptoms can still reflect significant brain dysfunction. This is why the pattern of symptoms, the mechanism of injury, medication use, age, and underlying health conditions all matter during evaluation. ^[1][2][4]

Diagnosis is based on clinical assessment, neurologic examination, and sometimes imaging such as CT. Not every head injury requires imaging, but certain red flags increase the need for urgent evaluation. Clinicians look at loss of consciousness, amnesia, anticoagulant use, repeated vomiting, worsening symptoms, age, and the circumstances of trauma. ^[1][3]

Treatment depends on severity. Mild injuries may require observation, graded return to activity, symptom management, and avoidance of another head injury during recovery. Moderate or severe injuries may require hospitalization, monitoring for brain swelling or bleeding, surgery, rehabilitation, and long-term follow-up. ^[1][2][3]

Recovery time varies. Some people improve over days to weeks, while others develop persistent symptoms involving concentration, mood, sleep, headache, or balance. Return to school, work, exercise, and sports should be individualized rather than rushed. Particularly after concussion, a structured stepwise return is safer than immediate full activity. ^[2][3]

Urgent medical assessment is needed after head injury if there is loss of consciousness, repeated vomiting, seizure, increasing drowsiness, confusion, weakness, severe headache, fluid leaking from the nose or ears, or any clear worsening over time. ^[1][2][3]