Headache is a common experience in adults. Recurring headaches negatively impact family life, social activity, and work capacity. [1, 2] Worldwide, according to the World Health Organization, migraine alone is 19th among all causes of years lived with disability. Headache is third among reasons for seeking chiropractic care in North America. 
The evidence supports the use of spinal manipulation for the chiropractic management of patients with migraine or cervicogenic headaches but not tension-type headaches. For migraine, multidisciplinary care using weekly 45-minute massage therapy and multimodal care (exercise, relaxation, and stress and nutritional counseling) may also be effective. Alternatively, joint mobilization or deep neck flexor exercises are recommended for improving symptoms of cervicogenic headache. There appears to be no consistently additive benefit of combining joint mobilization and deep neck flexor exercises for patients with cervicogenic headache. Moderate evidence support the use of low-load craniocervical mobilization for longer term management of tension-type headaches.
J Manipulative Physiol Ther. 2011 (Jun); 34 (5): 274–289