Catalog
Chronic headache associated with a substance or its withdrawal
Link to WHO Definition
Chronic headache associated with a substance or its withdrawal – http://id.who.int/icd/entity/316533152
Chronic headache associated with a substance or its withdrawal is caused by use of, exposure to or withdrawal from a substance, and has a duration of more than three months. The pain occurs on at least 50% of the days during at least three months. The duration of pain per day is at least 2 hours.