Paroxysmal Hemicrania

1. At least 20 attacks fulfilling criteria B-D
2. Attacks of severe unilateral orbital, supraorbital or temporal pain lasting 2-30 minutes
3. Headache is accompanied by at least one of the following:
   1. ipsilateral conjunctival injection and/or lacrimation
   2. ipsilateral nasal congestion and/or rhinorrhoea
   3. ipsilateral eyelid oedema
   4. ipsilateral forehead and facial sweating
   5. ipsilateral miosis and/or ptosis
4. Attacks have a frequency above 5 per day for more than half of the time, although periods with lower frequency may occur
5. Attacks are prevented completely by therapeutic doses of indomethacin
6. Not attributed to another disorder