Description:

Attacks of SUNCT occurring in periods lasting from 7 days to one year, separated by pain-free periods lasting 3 months or more.

Diagnostic criteria:
  1. Attacks fulfilling criteria for 3.3.1 Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing and occurring in bouts
  2. At least two bouts lasting from 7 days to 1 year (when untreated) and separated by pain-free remission periods of ≥3 months.