Cluster headache diagnostic criteria

Diagnostic criteria for cluster headache require at least 5 attacks, unilateral orbital pain lasting >15 minutes and presence of sense of agitation or restlesness accompained with or without conjcutival injection, nasal congestion, eyelid edema and miosis.

Diagnostic criteria for cluster headache require the following as per ICHD-3: International Classification of Headache Disorders, 3rd edition.:^[1]

• At least five attacks
• Severe or very severe unilateral orbital, supraorbital, and/or temporal pain lasting 15 to 180 minutes when untreated; during part (but less than half) of the active time course of cluster headache, attacks may be less severe and/or of shorter or longer duration
• Either or both of the following:
  1. At least one of the following symptoms or signs ipsilateral to the headache:
     1. Conjunctival injection and/or lacrimation
     2. Nasal congestion and/or rhinorrhea
     3. Eyelid edema
     4. Forehead and facial sweating
     5. Miosis and/or ptosis

2. A sense of restlessness or agitation

• Attacks have a frequency between one every other day and eight per day; during part (but less than half) of the active time-course of cluster headache, attacks may be less frequent

Diagnostic criteria for episodic cluster headache require the following:

• Attacks fulfilling criteria for cluster headache and occurring in bouts (cluster periods)
• At least two cluster periods lasting from seven days to one year (when untreated) and separated by pain-free remission periods of three months or more

Diagnostic criteria for chronic cluster headache require the following:

• Attacks fulfilling criteria for cluster headache
• Attacks occurring without a remission period, or with remissions lasting less than three months, for at least one year

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