Post-Traumatic Headache: How It Differs From an Ordinary Headache and When It Warrants Evaluation

Headache is one of the most common complaints after a concussion or mild traumatic brain injury (mTBI), and it's often the symptom patients try to manage on their own first, an over-the-counter pain reliever, some rest, the assumption it will fade like an ordinary tension headache. But a headache that starts after a head injury isn't automatically the same thing as a headache that would have happened anyway. It has its own diagnostic category, its own typical course, and its own risks if it isn't looked at directly. Our physician team evaluates post-traumatic headache (PTH) as a distinct clinical picture, not as a side note to the rest of a concussion workup.

What Actually Makes a Headache "Post-Traumatic"

The formal diagnostic framework used across headache medicine, the International Classification of Headache Disorders, 3rd edition (ICHD-3), defines headache attributed to traumatic injury to the head as headache that develops within seven days of the injury, of regaining consciousness following the injury, or of regaining the ability to sense and report pain. ICHD-3 further splits the diagnosis by duration: acute post-traumatic headache resolves within three months of onset, while persistent post-traumatic headache continues beyond that three-month mark. That distinction matters clinically. A headache that is following the expected early trajectory is a different conversation than one that is settling in past the three-month point (International Headache Society, ICHD-3, Section 5.2).

It Often Resembles Migraine, But the Overall Pattern Is Different

According to PubMed, a cross-sectional study of 405 adults evaluated by a neurologist for post-traumatic headache after mTBI found that many individual features overlapped with migraine: photophobia in 88.4% of patients, phonophobia in 83.2%, nausea or vomiting in 69.0%, and a pulsating or throbbing quality in 64.2%. But the overall pattern often diverged from typical migraine. Most patients reported headache on 26 or more days per month, and more than a quarter described their headache as continuous rather than episodic (Cortel-LeBlanc et al., 2025, Cephalalgia, DOI). That combination, migraine-like features layered onto a far more persistent, higher-frequency pattern, is part of why post-traumatic headache doesn't always respond the way a patient's prior experience with ordinary headaches might lead them to expect.

Not Everyone Follows the Same Course

According to PubMed, a multicenter prospective study following 478 adults with mTBI from the time of injury to six months later found that 22.6% went on to develop persistent post-traumatic headache. The strongest early predictors of a persistent course were an acute headache that lasted more than 30 consecutive days and a high initial score on the Headache Impact Test (HIT-6), a validated measure of headache-related disability. Patients with a pre-existing history of migraine were more likely to develop migraine-like PTH features and scored worse on measures of disability, sleep, and mood (Atalar et al., 2026, J Neurotrauma, DOI). None of this means a given patient's headache will or won't persist. It means the trajectory is genuinely variable from one person to the next, which is exactly why it's evaluated individually rather than assumed to follow a fixed timeline.

Headache Is Also a Marker of Broader Injury Severity

Post-traumatic headache isn't confined to mild injuries. According to PubMed, a systematic review and meta-analysis of chronic pain after complicated mild-to-severe traumatic brain injury found a pooled headache prevalence of 31% among adults at least three months post-injury, with prior headache or migraine history identified as one of several factors associated with developing chronic pain after TBI (Papic et al., 2025, Pain, DOI). Taken together with the phenotype research above, this is part of why our physician team treats a new or ongoing headache after any head injury as clinically meaningful information, not background noise to be managed separately from the rest of the evaluation.

Why Common Acute Treatments Don't Always Work as Expected

Because post-traumatic headache can look and feel like an ordinary bad headache, it's tempting to treat it the same way. But the evidence doesn't always support that assumption. According to PubMed, a randomized, double-blind, placebo-controlled trial in two emergency departments tested whether adding IV dexamethasone to standard IV metoclopramide improved outcomes for patients with acute post-traumatic headache, meeting ICHD-3 criteria, compared with metoclopramide plus placebo. The addition of dexamethasone did not improve the primary outcome, and rates of sustained headache relief were similar between groups (13.0% vs 15.2%) (Joudi et al., 2026, Headache, DOI). Findings like this are one more reason self-managing a persistent post-traumatic headache with escalating over-the-counter or leftover prescription medication isn't the same as having it evaluated by a physician who can consider the fuller clinical picture.

Frequent Medication Use Can Become Its Own Problem

The same cohort study cited above found that acute headache medication was being used three or more days per week by 53.8% of patients, and daily by 35.3% (Cortel-LeBlanc et al., 2025, Cephalalgia, DOI). Frequent use of acute pain medication is a recognized pathway to medication overuse headache, a secondary headache disorder where the treatment itself starts perpetuating the problem it was meant to solve. This is one of several reasons a patient with frequent post-traumatic headache benefits from a physician-directed plan rather than open-ended use of whatever is on hand.

When It's Worth Raising With a Physician

A headache in the days immediately following a head injury isn't unusual on its own. But headache that persists beyond a few weeks, that is becoming more frequent rather than less, that requires medication use most days of the week, or that is accompanied by new or worsening neurological symptoms is worth describing to a physician rather than working around indefinitely. Our physician team evaluates post-traumatic headache alongside the rest of a patient's post-concussion picture, considering headache pattern, timeline, and other symptoms together rather than in isolation.

Getting Evaluated

If a headache has followed a head injury and hasn't resolved the way an ordinary headache would, it's worth bringing up directly rather than assuming it will pass on its own. Learn more about concussion care at NeuroLUX, or schedule an evaluation with the physician team.