Heat therapy is an ancient treatment method currently used worldwide to treat different painful conditions, such as musculoskeletal and menstrual pain. The most common applications are muscular pain and soreness as well as joint pain, stiffness and osteoarthritis. Heat therapy is mainly recommended for reducing pain and increasing function in patients with acute low back pain and in patients with delayed onset muscle soreness. The market offers several heat therapy devices, and for some of these products efficacy and tolerability are widely proven by clinical trials.