A post-traumatic headache (PTH) is a headache that develops within seven days of a head injury, a blow to the neck, or regaining consciousness after trauma. It’s the most common symptom following a concussion or traumatic brain injury, affecting roughly 47% of people who experience even a mild head injury. If the headache resolves within three months, it’s classified as acute. If it persists beyond that point, it becomes what doctors call a persistent post-traumatic headache.
How It Feels: Migraine-Like and Tension-Like Types
Post-traumatic headaches don’t have a single signature pattern. Instead, they tend to mimic the two most common primary headache types: migraines and tension headaches. Some people experience one pattern consistently, while others alternate between the two.
The migraine-like version typically involves moderate to severe pain on one side of the head. It throbs or pounds, lasts several hours per episode, and worsens with physical activity, bright lights, loud noise, or strong odors. Some people even report visual auras before the pain begins. The tension-like version presents differently: bilateral pressing or dull pain, mild to moderate in intensity, worsened by emotional stress rather than sensory triggers, and without the light sensitivity that marks migraines.
Both types can be remarkably frequent. In one clinical study comparing the two phenotypes, roughly 40% of people with migraine-like PTH and nearly 60% of those with tension-like PTH reported daily headaches. Another 30 to 40% in both groups had headaches several times a week. Beyond the head pain itself, post-traumatic headaches commonly come bundled with dizziness, neck pain, and cognitive difficulties like trouble concentrating or thinking clearly. These accompanying symptoms are one reason PTH can be more disruptive to daily life than the headache alone would suggest.
What Causes the Pain After a Head Injury
The headache doesn’t come from the skull itself. It originates from a cascade of changes inside the brain triggered by the initial trauma, even when that trauma is relatively mild.
The first problem is neuroinflammation. Within minutes of a head injury, the brain’s immune cells (called microglia) activate and release a flood of inflammatory molecules. This inflammation develops quickly, has been detected in brain tissue within minutes of injury, and can persist for weeks or longer. It alters the sensitivity of the membranes surrounding the brain and the blood vessels that feed it, both of which are key structures in generating head pain.
At the same time, the injury damages cells in a way that spills potassium into the spaces between neurons, triggering abnormal nerve firing and the release of pain-promoting chemical signals. The brain also enters a kind of energy crisis: the trauma activates repair enzymes that drain cellular fuel reserves, impair the energy-producing structures inside cells, and can push neurons toward death.
A third piece involves serotonin, a brain chemical that normally helps suppress pain signals. After a head injury, serotonin levels spike for the first few days, then drop and can remain low for an extended period. Since serotonin normally keeps pain-signaling molecules like CGRP (a protein strongly linked to migraine) in check, this sustained dip may explain why headaches persist long after the initial injury heals. These overlapping mechanisms are why post-traumatic headaches so closely resemble migraines: they activate many of the same neural pain systems.
How Long It Lasts
For many people, post-traumatic headaches improve gradually and resolve within the first three months. But the condition is far more stubborn than early reassurances might suggest. A large meta-analysis combining data from 14 years of research found that overall, about 47% of adults with a traumatic brain injury still had post-traumatic headaches at follow-up. Notably, the prevalence was similar whether researchers checked at 3 months, 6 months, 12 months, or beyond 3 years, suggesting that once a headache becomes persistent, it tends to stay persistent without targeted treatment.
Who Is Most at Risk
Two factors stand out in research on who develops chronic post-traumatic headache after a mild traumatic brain injury: being female, and having a headache at the time of initial evaluation in the emergency department. The female sex difference mirrors patterns seen in migraines more broadly, where hormonal factors are believed to play a role in pain processing.
People who had pre-existing migraines or other headache disorders before their injury are also vulnerable. In these cases, the trauma can double or triple headache frequency and severity, effectively converting a manageable condition into a chronic one. Brain imaging studies show that people with persistent PTH have measurable differences in brain volume, surface area, nerve fiber integrity, and the way different brain regions communicate compared to people with standard migraines, reinforcing that PTH is its own condition rather than just a regular headache triggered at an unlucky time.
How Post-Traumatic Headaches Are Treated
There are no medications designed specifically for post-traumatic headache. Instead, treatment is matched to whichever primary headache type the PTH most closely resembles. If your headaches look like migraines, you’ll be treated with migraine-directed therapies. If they look like tension headaches, the approach shifts accordingly. This phenotype-matching strategy has real support: in one study where preventive medications were chosen based on each patient’s specific headache characteristics, 64% reported improvement and 45% had their headaches resolve entirely.
For acute pain relief, over-the-counter options like acetaminophen and ibuprofen are first-line choices. One randomized trial found that starting these on a regular schedule within 48 hours of injury reduced both headache frequency and intensity over the following week. The key is using them early and consistently rather than waiting for pain to become severe.
Non-Drug Approaches
Cognitive behavioral therapy has the strongest evidence among non-drug treatments. In a trial with military veterans who had both post-traumatic headache and PTSD, eight weeks of headache-focused CBT significantly reduced headache-related disability compared to usual care. A separate trial in adolescents with post-concussion headaches found that six months of CBT, which included activity pacing, coping skills, relaxation techniques, and sleep hygiene, produced significant improvement in headache and other post-concussion symptoms.
Physical therapy focused on the neck and vestibular system (the inner-ear balance system) has also shown promise. One randomized trial of cervicovestibular rehabilitation in sport-related concussions found that after eight weeks, significantly more patients in the treatment group were cleared to return to sport and reported no current headache. Multimodal programs combining sport-specific training with vestibular, eye-movement, and cervical spine rehabilitation have also reduced headache severity scores in athletes with post-concussion syndrome. Acupuncture is sometimes discussed as an additional option when first-line treatments aren’t enough, though the evidence base is thinner.
The practical takeaway is that persistent post-traumatic headache usually responds best to a combination approach: medication matched to your headache type, plus active rehabilitation that addresses the neck, balance, and psychological components that keep the pain cycle going.