Headache
fulfilling the following on ≥15 days/month for >3 months:
Headache
has at least two of the following characteristics: 1. unilateral location 2. Pulsating
quality, 3.moderate or severe pain intensity, 4.aggravation by or causing
avoidance of routine physical activity and during headache at least one of the
following: 1. nausea and/or vomiting, 2. photophobia and phonophobia
Not
attributed to another disorder but there is, or has been within the last 2
months, medication overuse fulfilling the following: 1.Regular overuse for ≥3
months of one or more drugs that can be taken for acute and/or symptomatic
treatment of headache, 2. Headache has developed or markedly worsened during
medication overuse, 3. Headache resolves or reverts to its previous pattern within
2 months after discontinuation of overused medication
