The Short Answer Educational content only. Any suspected concussion warrants medical evaluation. New, severe, or changing headache after head injury warrants prompt assessment by a physician, neurologist, or headache specialist to confirm the diagnosis and exclude dangerous causes. Consult a concussion-experienced clinician for individualized care. Concussion triggers post-traumatic migraine with aura because the injury lowers the threshold for cortical spreading depression, the slow wave of brain activity that produces aura, and activates the trigeminovascular pain system (Ashina et al., 2019). Aura is a reversible neurological disturbance, most often visual, that precedes or accompanies the headache. It is generated by cortical spreading depression, a wave of intense activity followed by suppression that travels slowly across the cortex. Concussion makes the injured, hyperexcitable brain more prone to this wave and to trigeminovascular activation, producing migraine attacks with aura that were not present before the injury. Because aura carries specific evaluation and treatment considerations, accurate diagnosis guides safe, targeted management. Aura is generated by cortical spreading depression across the cortex. Concussion lowers the threshold for this wave in a hyperexcitable brain. Aura carries specific evaluation and treatment considerations. What Migraine With Aura Is Migraine with aura is a migraine in which a reversible neurological disturbance develops before or during the headache. The most common aura is visual: shimmering or zigzag lines, a slowly expanding blind spot, flashing lights, or geometric patterns that build over minutes and then fade. Aura can also be sensory, with tingling or numbness spreading across the face or arm, or affect speech and language. By definition aura develops gradually, lasts up to an hour, and fully resolves, and it is typically followed by the migraine headache with its throbbing pain, nausea, and light and sound sensitivity. The gradual build and spread of aura, and its full reversibility, are important features. They distinguish migraine aura from the sudden onset of more dangerous neurological events, which is one reason new aura after head injury needs proper evaluation. Cortical Spreading Depression Aura is generated by cortical spreading depression, a wave of intense neuronal activity followed by a period of suppression that moves slowly across the surface of the brain. As this wave passes over the visual cortex it produces the visual aura, and as it crosses sensory or language areas it produces the corresponding sensory or speech symptoms. The slow speed of the wave explains why aura builds and spreads gradually over minutes rather than appearing all at once. The wave also activates the trigeminovascular system, linking the aura to the headache that follows. How Concussion Lowers the Threshold Concussion leaves the brain in a hyperexcitable, metabolically strained state. The injury disturbs the balance of excitation and inhibition in the cortex and alters the ion gradients that keep neurons stable. This makes the brain more susceptible to cortical spreading depression, the same wave that produces aura, so the threshold for triggering an aura is lowered. At the same time, the injury sensitizes the trigeminovascular pain system, making migraine headache more likely. The result is that a person may develop migraine with aura after a concussion even without a prior history of it, or someone with prior migraine may find their aura becomes more frequent or changes character. This reflects the injured brain's increased tendency toward the spreading wave, and it typically improves as the brain recovers and cortical excitability normalizes. Symptom Presentation Visual aura: shimmering or zigzag lines, expanding blind spot, or flashing patterns Sensory aura: tingling or numbness spreading across the face or arm Speech or language disturbance during aura Aura that builds gradually over minutes and fully resolves within an hour A migraine headache with throbbing pain, nausea, and light and sound sensitivity New aura, or a change in aura, after a concussion Assessment A physician or neurologist diagnoses migraine with aura from the characteristic gradual, reversible aura followed by migraine headache, using the International Classification of Headache Disorders criteria. New aura after head injury warrants careful evaluation to exclude dangerous causes, since some serious neurological events can mimic aura, and imaging is often obtained, particularly when the aura is atypical, sudden, or prolonged. The clinician also reviews the person's vascular risk factors, because migraine with aura carries specific considerations for certain medications and cardiovascular risk. Treatment Approach Treatment follows migraine management, adapted for the presence of aura. Acute treatment targets attacks, and the clinician selects agents with the aura and the person's vascular risk in mind. When attacks are frequent, preventive treatment reduces their number, and post-traumatic migraine often responds to standard migraine preventives. Because aura interacts with cardiovascular risk and with certain medications such as some hormonal treatments, the clinician weighs these factors in the plan. Supporting brain recovery reduces the tendency toward aura. Graded return to activity, sub-symptom-threshold aerobic exercise, sleep, and autonomic regulation help normalize the cortical excitability that lowers the aura threshold. Addressing the cervical contribution and avoiding medication overuse support the migraine treatment. As the brain recovers, post-traumatic migraine with aura commonly improves, though a headache specialist guides management when it is frequent or persistent. Post-traumatic headache often has a cervical and autonomic component that responds to daily mobility and nervous system regulation alongside medical care. Start your 3-day free trial to build a supportive routine. Supporting Mobility Routine JME 155 Diaphragmatic breathing lowers the sympathetic drive that fuels headache and supports steady cerebral blood flow. Ten slow breaths, several times daily. JME 14 Chin tucks activate deep cervical flexors and reduce the upper cervical tension that refers pain to the head. Ten repetitions with 5-second holds. JME 1 Cervical rotation restores segmental mobility at the joints that refer pain into headache through the trigeminocervical nucleus. Ten repetitions per direction. JME 15 Cervical lateral flexion addresses side-bending restriction that sustains neck-driven headache. Ten repetitions per side. JME 16 Cervical flexion and extension restore sagittal mobility restricted by suboccipital guarding. Eight slow repetitions. JME 2 Cervical retraction reinforces a neutral head position that reduces the postural strain feeding headache. Ten repetitions per set. JME 150 Thoracic rotation restores mid-back motion needed for full cervical range and relaxed upright posture. Eight repetitions per direction. JME 227 Overhead reach opens the thoracic spine and reduces the compensatory upper cervical extension that drives headache. Ten repetitions with controlled tempo. Start your 3-day free trial for joint-specific mobility programming that addresses the cervical and autonomic contributors to post-traumatic headache. Common Mistakes Assuming new aura after head injury is benign without proper evaluation Overlooking vascular risk factors relevant to aura and medication choice Treating frequent attacks acutely without considering prevention Allowing medication overuse to worsen the migraine pattern Neglecting sleep, activity, and cervical contributors that support recovery Progression Evaluation confirms the gradual, reversible aura and migraine pattern and excludes dangerous mimics, with imaging when the aura is atypical. Treatment follows migraine management adapted for aura and vascular risk, with prevention for frequent attacks. Brain-recovery support, sleep, graded exercise, and autonomic regulation lower the aura threshold. Post-traumatic migraine with aura commonly improves as the brain recovers. What is aura in a migraine? Aura is a reversible neurological disturbance that precedes or accompanies the migraine headache, most often visual, such as shimmering or zigzag lines or an expanding blind spot. It can also be sensory or affect speech. Aura builds gradually over minutes, lasts up to an hour, and fully resolves, and it is generated by a slow wave of brain activity called cortical spreading depression. Can a concussion cause migraine with aura for the first time? Yes. Concussion leaves the brain hyperexcitable and lowers the threshold for cortical spreading depression, the wave that produces aura, so migraine with aura can appear after injury even without a prior history. Someone with prior migraine may find their aura becomes more frequent or changes. It typically improves as the brain recovers. Is aura after a concussion dangerous? Migraine aura itself is benign, but new aura after head injury needs proper evaluation because some serious neurological events can mimic it. Aura that is sudden rather than gradual, prolonged, or does not fully resolve warrants urgent assessment. Once dangerous causes are excluded, aura is managed as part of migraine treatment. Why does concussion make aura more likely? Concussion disturbs the balance of excitation and inhibition in the cortex and alters the ion gradients that keep neurons stable, making the brain more susceptible to cortical spreading depression. This lowers the threshold for triggering aura. As the brain recovers and cortical excitability normalizes, the tendency toward aura usually decreases. How is post-traumatic migraine with aura treated? Treatment follows migraine management adapted for aura, with acute medication chosen with vascular risk in mind and preventive treatment for frequent attacks. Supporting brain recovery through graded exercise, sleep, and autonomic regulation lowers the aura threshold, and addressing the cervical contribution and avoiding medication overuse support the plan. Red Flags Requiring Urgent Evaluation The following warrant same-day emergency evaluation rather than routine care. Sudden severe headache that peaks within seconds to minutes Headache with fever, neck stiffness, or rash New weakness, numbness, slurred speech, or facial droop New vision loss, double vision, or a persistent visual change Progressive worsening headache over days to weeks Headache with confusion, drowsiness, or repeated vomiting Headache with seizure or loss of consciousness Sudden severe neck pain with neurological symptoms, suggesting arterial dissection These features can indicate a dangerous cause and take priority over any headache-specific diagnosis. Absence of red flags supports outpatient evaluation and management. Medication Overuse Headache Frequent use of acute headache medication can produce medication overuse headache, where the treatment itself sustains a daily or near-daily headache. This is common after concussion, when frequent pain drives frequent medication use. As a general guide, using simple analgesics on 15 or more days per month, or triptans, combination analgesics, or opioids on 10 or more days per month, raises the risk. Preventive treatment and careful limits on acute medication, guided by a clinician, break the cycle. Recognizing medication overuse is essential, because it can mimic or worsen any post-traumatic headache pattern. Why a Precise Diagnosis Matters Post-traumatic headache is not one condition. It takes on the features of recognized primary headache disorders, and each has a specific, sometimes highly specific, treatment. Some headaches respond dramatically to one particular medication, others need targeted preventives, and others improve with cervical and autonomic treatment. A precise diagnosis by a physician, neurologist, or headache specialist, using the criteria of the International Classification of Headache Disorders, directs the person to the treatment most likely to work and avoids prolonged trial and error. Multidisciplinary Care and the Cervical Contribution Post-traumatic headache frequently has more than one driver. A cervical contribution from the neck is common, since the upper cervical joints and nerves refer pain to the head through the trigeminocervical nucleus, the same brainstem region where neck and head pain signals converge. Autonomic dysregulation, sleep disturbance, mood, and medication overuse each add to the picture. Coordinated care works best: a headache specialist or neurologist for diagnosis and medication, a physical therapist for the cervical and postural contribution, and attention to sleep, mood, and autonomic regulation. Treating the neck and nervous system alongside medical management improves many post-traumatic headaches that medication alone does not fully control. References Ashina, H., et al. (2019). Post-traumatic headache: epidemiology and pathophysiological insights. Nature Reviews Neurology, 15(10), 607-617. PubMed Headache Classification Committee of the International Headache Society (IHS). (2018). The International Classification of Headache Disorders, 3rd edition. Cephalalgia, 38(1), 1-211. PubMed Patricios, J. S., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed