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IHS Diagnosis ICD-10
3.1.1 Episodic cluster headache G44.01  


Cluster headache attacks occurring in periods lasting 7 days to 1 year separated by pain-free periods lasting 1 month or longer.

Diagnostic criteria:

  1. Attacks fulfilling criteria A-E for 3.1 Cluster headache
  2. At least two cluster periods lasting 7-365 days1 and separated by pain-free remission periods of ≥1 month


  1. Cluster periods usually last between 2 weeks and 3 months.


The duration of the remission period has been increased in this second edition to a minimum of 1 month.