Laughing therapy is a method of complimentary medicine used to boost the immune system and promote a general sense of wellbeing. According to various studies, laughter lowers blood pressure and reduces stress hormones. As stress hormones suppress immune activity, a decrease in these hormones translates into overall better health. Laughter also helps strengthen the immune system by raising levels of T-cells and proteins and cells which help produce antibodies. Laughter is also used as a painkiller. As it triggers the release of endorphins, which are the body's natural painkillers, laughter reduces pain and further aids in the healing process.

Laughter is also a very good coping mechanism when the body is suffering from disease. Research results indicate that patients who are able to maintain a positive mental attitude respond better to treatment. As laughing is aerobic, it provides a workout for the diaphragm as well as good cardiac conditioning, and increases the body's ability to use oxygen. Emotionally, laughter creates positive and healthier attitudes, which help individuals fight depression and feelings of helplessness.