The main criteria of "cervicogenic headache" are considered to be as follows: relatively rare and long-lasting unilateral attacks of severe headache, although seemingly of a non-excruciating character, signs of neck involvement, and lack of "cluster pattern". In the present communication, the clinical manifestations in 11 patients fulfilling these criteria are described. All 11 patients selected in accordance with these criteria proved to be females, the age at onset ranging from 6 to 40 years (mean, 30 years). The mean duration of symptoms was 13 years. Six patients had had previous head/neck injuries. All patients had pain periorbitally, in the temporal region, and in the low occipital region (nape of the neck); less frequent were frontal, parietal, and facial pain and pain in the upper part of the occipital region. The duration of attacks was from 3 h to 3 weeks, and the interval between attacks lasted from 2 days to 2 months. The commonest accompanying phenomena were phonophobia, dizziness, ipsilateral eyelid edema, ipsilaterally blurred vision, and irritability. Some of the patients also had nausea (n = 7) and vomiting (n = 6). On physical examination, slight to moderate reduction of movements in the neck was noted, and five patients had ipsilaterally reduced sensation for touch in the trigeminal area. All the patients except one were severely afflicted. Attacks could, in addition to occurring spontaneously, be precipitated in all patients by head movements or by pressure at specific points in the neck.