Laughter therapy, also called humor therapy, is the use of humor to promote overall health and wellness. Laughing is found to lower blood pressure, reduce stress hormones, increase muscle flexion, and boost immune function by raising levels of infection-fighting T-cells, disease-fighting proteins called Gamma-interferon and B-cells, which produce disease-destroying antibodies. Laughter also triggers the release of endorphins, the body’s natural painkillers, and produces a general sense of well-being.