Current regular (weekly or more often) practice of meditation; any major unstable medical/psychiatric illness (e.g., hospitalization within 90 days, suicide risk, etc.); other non-migraine chronic pain condition (e.g., fibromyalgia, low back pain, etc.) or sensory abnormalities (e.g., neuropathy, Raynaud's, etc.); diagnosis of medication overuse headache; volunteers with no pain ratings to frankly noxious stimuli (temperatures > 49°C) or excessive responses to threshold temperatures (~43°C); current or planned pregnancy or breastfeeding, any new medication started within 4 weeks of screening visit; unwilling to maintain stable current medication dosages for duration of trial; failure to complete baseline headache logs.