This randomized controlled clinical trial will examine the effects of CBT in patients with chronic widespread pain and insomnia. Sample will include 20 patients ([18]-65 years) who satisfy criteria for chronic widespread pain and insomnia. Participants will be randomly assigned to CBT or waitlist control. All participants randomized to the cognitive-behavioral interventions will receive 4 treatment sessions (~50 minutes each). Baseline, posttreatment, [& 3-mo.] follow-up assessments will include measures of sleep, pain, thermal pain response, heart rate variability, brain structure and functions, affect, cognitive functioning, cardiovascular health, and substance use.