Short lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA)
| A 3.3 Diagnostic criteria: |
| A At least 20 attacks fulfilling criteria B–E |
| B Attacks of unilateral orbital, supraorbital, or temporal stabbing pain lasting from two seconds to 10 minutes |
| C Pain is accompanied by one of: |
| (1) Conjunctival injection and/or tearing |
| (2) Nasal congestion and or rhinorrhoea |
| (3) Eyelid oedema |
| D Attacks occur with a frequency of one or more per day for more than half the time |
| E Not attributed to another disorder |
| A 3.3.1 Episodic SUNA |
| Description: SUNA attacks occurring for seven days to one year with pain free intervals longer than one month |
| A 3.3.2 Chronic SUNA |
| Description: At least two attack periods last seven days to one year separated by remission periods of less than one month (untreated) |