Table 10 Classification of tension-type headache [2]

2.1 [G44.2] Infrequent episodic tension-type headache

 A. At least 10 episodes of headache occurring on < 1 day/month on average (< 12 days/year) and fulfilling criteria B-D

 B. Lasting from 30 min to 7 days

 C. At least two of the following four characteristics:

  1. bilateral location

  2. pressing or tightening (non-pulsating) quality

  3. mild or moderate intensity

  4. not aggravated by routine physical activity such as walking or climbing stairs

 D. Both of the following:

  1. no nausea or vomiting

  2. no more than one of photophobia or phonophobia

 E. Not better accounted for by another ICHD-3 diagnosis.

2.2 [G44.2] Frequent episodic tension-type headache

As 2.1 apart from:

 A. A minimum of 10 episodes of headache occurring on ≥1

 day/month but < 15 days/month on average (≥12 and < 180 days/year) and fulfilling criteria B-D

2.3 [G44.2] Chronic tension-type headache

As 2.1 apart from:

Headache occurring on ≥15 days/month on average for > 3 months (≥180 days/year), fulfilling criteria B-D

 A. A minimum of 10 episodes of headache occurring on ≥1 day/month but < 15 days/month on average (≥12 and < 180 days/year) and fulfilling criteria B-D

 B. Lasting hours to days, or unremitting

 C. Both of the following:

  1. no more than one of photophobia, phonophobia or mild nausea

  2. neither moderate or severe nausea nor vomiting