Attacks of SUNA occurring in periods lasting from seven days to one year, separated by pain-free periods lasting at least one month.
A. Attacks fulfilling criteria for 3.3.2 Short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms and occurring in bouts
B. At least two bouts lasting from 7 days to 1 year and separated by pain-free remission periods of ≥1 month.