Infrequent episodic tension-type headache

1. At least 10 episodes occurring on <1 day per month on average (<12 days per year) and fulfilling criteria B-D
2. Headache lasting from 30 minutes to 7 days
3. Headache has at least two of the following characteristics:
   1. bilateral location
   2. pressing/tightening quality
   3. mild or moderate intensity
   4. not aggravated by routine physical activity such as walking or climbing stairs
4. Both of the following:
   1. no nausea or vomiting
   2. no more than one of photophobia or phonophobia
5. Not attributed to another disorder