Chronic SUNCT

Attacks of SUNCT occurring for more than one year without remission, or with remission periods lasting less than one month.

Diagnostic criteria:
A. Attacks fulfilling criteria for 3.3.1 Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing, and criterion B below
B. Occurring without a remission period, or with remissions lasting <1 month, for at least 1 year.