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Table 10 Classification of tension-type headache [2]

From: Reference programme: diagnosis and treatment of headache disorders and facial pain. Danish Headache Society, 3rd edition, 2020

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