Characteristics and relative factors of headache caused by cervicocerebral artery dissection.

The headache and neck pain caused by CAD is a moderate to severe pain occurring suddenly. The pain nature may be diverse but mostly like throbbing and pulsating. When the dissected artery is located in the posterior circulation, the pain is mostly in the occipital region, and mostly in the temporal region when the dissected artery is located in the anterior circulation. The pain can occur in ipsilateral, bilateral, or contralateral of the dissection. In addition, several factors might contribute to the occurrence of headache and neck pain.