Attacks of moderate or severe, strictly unilateral head pain lasting seconds to minutes, occurring at least once a day and usually associated with prominent lacrimation and redness of the ipsilateral eye.

Diagnostic criteria

A. At least 20 attacks fulfilling criteria B–D
B. Moderate or severe unilateral head pain, with orbital, supraorbital, temporal and/or other trigeminal distribution, lasting for 1–600 sec and occurring as single stabs, series of stabs or in a saw-tooth pattern
C. At least one of the following cranial autonomic symptoms or signs, ipsilateral to the pain:

  1. conjunctival injection and/or lacrimation
  2. nasal congestion and/or rhinorrhoea
  3. eyelid oedema
  4. forehead and facial sweating
  5. forehead and facial flushing
  6. sensation of fullness in the ear
  7. miosis and/or ptosis

D. Attacks have a frequency of at least one a day for more than half of the time when the disorder is active
E. Not better accounted for by another ICHD-3 diagnosis.

*SUNCT (short-lasting unilateral neuraligform with conjunctival injection and tearing) includes both 
**SUNA (short-lasting unilateral neuraliform with cranial autonomic symptoms ) includes either conjunctival injection or tearing, but not both.


Headache Classification Committee of the International Headache Society (IHS) (2013). The International Classification of Headache Disorders, 3rd edition (beta version). Cephalalgia 2013; 33: 9-807.

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