Hypnic headache

1. Dull headache fulfilling criteria B-D
2. Develops only during sleep, and awakens patient
3. At least two of the following characteristics:
   1. occurs >15 times per month
   2. lasts ≥15 minutes after waking
   3. first occurs after age of 50 years
4. No autonomic symptoms and no more than one of nausea, photophobia or phonophobia
5. Not attributed to another disorder