Diagnosis:
- >15 days per month for >6 months.
Subtypes:
Chronic tension type headache
Chronic migraine (see under migraine)
Transformed migraine: chronic daily headache that has evolved from migraine not meeting criteria for chronic migraine. Believed to be the late stage of chronic migraine.
Treatment:
Behavioural psychotherapy
Physical therapy for myofascial symptoms
Consider trigger point botulinum toxin injection or occipital nerve block
Prevention & acute treatment for underlying headache: migraine or tension