Cervicogenic headache is a relatively common and still controversial form of headache that originates from the neck structures. The pathophysiology probably results from various local pain-producing factors, such as intervertebral dysfunction, but the frequent coexistence of a history of head traumas still plays an important role. This report represents a series of pathophysiologic studies performed for patients with cervicogenic headache and the results achieved by a new pharmacologic treatment for the disease.