Cluster Headache Diagnosis and Treatment

Clinical Recognition

The International Headache Society diagnostic criteria identify severe unilateral orbital, supraorbital, or temporal pain lasting 15-180 minutes when untreated, with ipsilateral autonomic features, as pathognomonic for cluster headache, not migraine, in patients with unilateral headache and ipsilateral eye tearing 1
Cluster headache is characterized by attack frequency of one to eight attacks per day during cluster periods, with severe unilateral pain and ipsilateral autonomic features, including lacrimation, nasal congestion, and forehead/facial sweating, distinguishing it from migraine 1
The presentation of unilateral headache with ipsilateral eye tearing is distinct from migraine, which typically presents with bilateral or alternating-side headache, photophobia/phonophobia, and nausea, according to the American Family Physician 2, 3

High-flow oxygen therapy, at 12-15 liters per minute via non-rebreather mask for 15-20 minutes, is the gold-standard first-line treatment for acute cluster headache attacks, providing rapid relief within 15 minutes in 70-80% of patients, with no contraindications or medication overuse risk, as recommended by the American Family Physician 3, 5
The American Family Physician recommends prescribing high-flow oxygen therapy for home use with portable oxygen tanks, for patients with cluster headache, to provide rapid and effective relief 5

The American Family Physician advises limiting acute treatment to 2 days per week maximum, to prevent medication-overuse headache, which can occur with triptans, ergotamine, opioids, and caffeine-containing analgesics, in patients with cluster headache 4, 6

The American Family Physician suggests considering preventive therapy if attacks occur two or more times per month, causing significant disability, or if rescue medication is required more than twice weekly, for patients with cluster headache 4

The American Family Physician recommends obtaining neuroimaging if new-onset headache occurs after age 50, or if there is a rapidly increasing frequency or severity of headaches, abnormal neurologic examination, or headache worsening with Valsalva maneuver, in patients with suspected cluster headache 1, 7

The American Family Physician advises against using acetaminophen alone, as it is ineffective for both migraine and cluster headache, and against using opioids routinely, due to the risk of dependency, rebound headaches, and loss of efficacy, in patients with cluster headache 2, 3, 5