People who have experienced an intense headache for a day or even a few hours know that it can feel like trying to navigate the world in a vise. Almost every movement you make and thought you have seems stifled behind a mottled scrim of pain and tightness. The intense physical pain of post-injury headache, especially if it doesn't resolve quickly, can also lead to depression, anxiety, sleep problems, and other issues.

Post-traumatic headache is the most common complaint after brain injury. In fact, approximately 70 percent of people who have had a mild TBI or concussion complain of post-traumatic headache. It can also be a sign or symptom of an undiagnosed brain injury.

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