Description: A disorder evolving from frequent episodic tension-type headache, with daily or very frequent episodes of headache, typically bilateral, pressing or tightening in quality and of mild to moderate intensity, lasting hours to days, or unremitting. The pain does not worsen with routine physical activity, but may be associated with mild nausea, photophobia or phonophobia. |
Diagnostic criteria: |
A. Headache occurring on ≥15 days per month on average for more than three months (≥180 days per year) and fulfilling criteria B through D |
B. Lasting hours to days, or unremitting |
C. At least two of the following 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 more than one of photophobia, phonophobia or mild nausea |
2. Neither moderate or severe nausea nor vomiting |
E. Not better accounted for by another ICHD-3 diagnosis |
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