Which factors may provoke cluster headache (CH)?

Updated: Jun 07, 2019
  • Author: Michelle Blanda, MD; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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Several factors have been shown to provoke CH attacks. Subcutaneous injection of histamine provokes attacks in 69% of patients. Stress, allergens, seasonal changes, or nitroglycerin may trigger attacks in some patients. Alcohol induces attacks during a cluster but not during remission. About 80% of CH patients are heavy smokers, and 50% have a history of heavy ethanol use.

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