DIAGNOSING CERVICOGENIC HEADACHE More than 60% of patients with neck pain also experience headache. For this reason it's important to be able to diagnose different forms of headache as their treatment differs. For cervicogenic headache different signs & symptoms are described by the International Headache Society (IHS) and Sjaastad et al. (2008). Watch the video to learn more about these S&S! Be aware that unilateral headache might also represent a red flag in the form of cervical artery disease