Post-Traumatic Headache
Post-traumatic headache (PTH) is the most common symptom following traumatic brain injury (TBI), occurring in 30-90% of concussion patients. The ICHD-3 defines PTH as headache developing within 7 days of head injury. Most cases resolve within 3 months (acute PTH), but 20-30% persist beyond 3 months (persistent PTH). Persistent PTH often resembles migraine or tension-type headache in phenotype, and treatment is guided by the predominant headache phenotype rather than the traumatic etiology.
Bottom Line
- Onset: Within 7 days of TBI (or within 7 days of regaining consciousness if applicable)
- Acute PTH: Resolves within 3 months. Persistent PTH: Continues beyond 3 months (— the clinically challenging form).
- Phenotype-based treatment: Most persistent PTH resembles migraine (~60%) or TTH (~30%). Treat according to the phenotype.
- Paradox of severity: PTH severity does not correlate with TBI severity — mild TBI/concussion produces persistent headache more often than severe TBI
- No PTH-specific treatments exist — management is borrowed from primary headache disorders based on attack characteristics
- Address comorbidities: PTSD, anxiety, depression, insomnia, and cognitive dysfunction commonly coexist and worsen the headache prognosis
ICHD-3 Criteria
| Type | Criteria |
|---|---|
| Acute PTH attributed to moderate or severe TBI (5.2.1.1) |
A. Headache fulfilling C and D B. Traumatic injury to the head has occurred C. Headache develops within 7 days of injury (or within 7 days of regaining consciousness and/or ability to sense and report pain) D. For acute: resolves within 3 months. For persistent: continues >3 months. |
| Persistent PTH attributed to mild TBI (5.2.2.2) |
Phenotypes
| Phenotype | Frequency in Persistent PTH | Features | Treatment Approach |
|---|---|---|---|
| Migraine-like | ~55-60% | Pulsating, moderate-severe, photo/phonophobia, nausea, worsened by activity | Treat as migraine: triptans for acute, standard migraine preventives |
| TTH-like | ~25-30% | Bilateral pressing, mild-moderate, no migrainous features | Treat as TTH: NSAIDs for acute, amitriptyline for prevention |
| Cervicogenic | ~10-15% | Unilateral, radiating from neck, triggered by neck movement, associated neck trauma/whiplash | Physical therapy, cervical nerve blocks, manual therapy |
| Occipital neuralgia | ~5% | Shooting/electric pain in occipital distribution, tenderness over occipital nerves | GON block, gabapentin/pregabalin |
| Mixed | Common | Features of multiple phenotypes; headache character varies between attacks | Address the predominant phenotype; combination approach |
Acute Management (First 3 Months)
Early PTH Management
- Relative rest (not strict bed rest): Current evidence supports a brief period of reduced activity (24-48 hours), followed by gradual return to activity as tolerated. Prolonged strict rest worsens outcomes.
- Acute medications: NSAIDs (ibuprofen, naproxen) first-line. Triptans if migraine-like phenotype. Acetaminophen as alternative.
- MOH prevention: Counsel from the outset to limit acute medication to <10-15 days/month. MOH developing on top of PTH is common and worsens prognosis.
- Reassurance: Most PTH resolves within 3 months. Setting realistic expectations improves outcomes.
- Sleep optimization: Sleep disruption post-concussion is very common and directly worsens headache. Address early.
- Screen for comorbidities: Depression (PHQ-9), anxiety (GAD-7), PTSD (PCL-5), sleep (ISI). Treat concurrently.
Persistent PTH Management
Preventive Therapy
No RCTs have been conducted specifically for persistent PTH prevention. Treatment is extrapolated from primary headache evidence based on the phenotype.
| Agent | Best For | Notes |
|---|---|---|
| Amitriptyline 25-75 mg | Migraine-like or TTH-like PTH with insomnia | Most commonly used preventive in PTH clinics. Dual benefit for headache + sleep. Level B evidence for migraine/TTH (extrapolated). |
| Topiramate 50-100 mg | Migraine-like PTH | Caution: cognitive side effects may compound post-concussive cognitive symptoms. Use at low doses. Monitor cognition. |
| Propranolol 60-160 mg | Migraine-like PTH with comorbid anxiety or autonomic dysregulation | Addresses migraine + tachycardia/anxiety sometimes seen post-concussion |
| Venlafaxine ER 150 mg | Migraine-like PTH with comorbid depression/anxiety | Treats headache + mood. Useful when psychiatric comorbidity is prominent. |
| OnabotulinumtoxinA | Chronic migraine-like PTH (≥15 headache days/month) | PREEMPT protocol. Used off-label for persistent PTH. Open-label data suggest benefit. No PTH-specific RCTs. |
| CGRP mAbs | Migraine-like PTH refractory to oral preventives | Post-hoc analyses of migraine trials included some PTH patients. Open-label PTH-specific studies are ongoing. Used in practice. |
| GON blocks | Any PTH phenotype, especially occipital-predominant or cervicogenic | Every 2-4 weeks. Low risk, can be combined with any medication. |
Non-Pharmacologic Approaches
- Graded aerobic exercise: The most important non-pharmacologic intervention. Sub-symptom threshold aerobic exercise (e.g., Buffalo Concussion Treadmill Test to determine threshold, then exercise below it) improves recovery and reduces headache frequency.
- Cognitive behavioral therapy: Addresses pain catastrophizing, avoidance, and comorbid anxiety/PTSD. Effective for persistent PTH in observational studies.
- Physical therapy: Cervical spine manual therapy, vestibular rehabilitation (if dizziness/imbalance), postural correction
- Biofeedback: Effective for headache; also useful for autonomic dysregulation post-concussion
- Sleep hygiene: Fundamental. Screen for and treat insomnia (CBT-I) and sleep apnea.
Prognostic Factors
| Factor | Association with Persistent PTH |
|---|---|
| Pre-existing migraine history | Strongest predictor of persistent PTH |
| Female sex | Higher risk of persistent PTH |
| Psychiatric comorbidity (anxiety, depression, PTSD) | Strongly associated with chronification |
| Litigation / compensation | Associated with delayed recovery (complex relationship; not purely malingering) |
| Early medication overuse | Predicts chronification |
| TBI severity | Paradoxically, mild TBI has higher persistent PTH rates than severe TBI |
Red Flags in Post-Traumatic Headache
- Progressive worsening weeks after injury — evaluate for expanding subdural hematoma, hydrocephalus, or CSF leak
- New focal neurologic signs not present at initial evaluation
- Seizures — post-traumatic epilepsy risk
- Positional component developing after initial improvement — consider post-traumatic CSF leak
- Fever, meningismus — if skull fracture or penetrating injury, evaluate for infection
References
- Ashina H, et al. Post-traumatic headache: epidemiology and pathophysiology. Nat Rev Neurol. 2019;15(10):607-617.
- Headache Classification Committee of the International Headache Society. The International Classification of Headache Disorders, 3rd edition. Cephalalgia. 2018;38(1):1-211.
- Larsen EL, et al. Acute and preventive pharmacological treatment of post-traumatic headache: a systematic review. J Headache Pain. 2019;20(1):98.
- Leddy JJ, et al. Early subthreshold aerobic exercise for sport-related concussion: a randomized clinical trial. JAMA Pediatr. 2019;173(4):319-325.
- Dwyer B. Posttraumatic headache. Semin Neurol. 2018;38(6):619-626.