Background: Headache is the most ancient reported pain in humans. It has significant detrimental effect on the quality of life of the sufferers.Migraine is ranked as the eighth most burdensome disease and the seventh highest cause of disability in the world. India appears to have a very high prevalence of migraine, and of other headache disorders in line with global averages. The prevalence of common migraine among chronic headache patients attending ENT OPD in a tertiary care Centre, Kollam, Southern Kerala and to assess the trigger factors of common migraine was studied.