Research to date suggests that individuals with headache use avoidance as a way to manage their pain. Despite the wide use of avoidance as a coping mechanism of headache triggers, very little empirical evidence exist to support its effectiveness in headache management. New treatment approaches, such as Acceptance and Commitment Therapy (ACT), emphasize acceptance of headache and valued-living as alternatives to avoidance, have demonstrated preliminary support in helping individuals reduce headache-related disability and improve quality of life. Though, ACT has received empirical support for various chronic pain conditions, very little evidence exists as to its effectiveness for head pain problems. The current study will examine the effects of an ACT-based intervention when added to medical treatment as usual (MTAU) vs. a wait list control group comprised only of MTAU, on improving quality of life and decreasing disability among headache sufferers.