It is found that a good mood is a prerequisite for maintaining people's normal physiological skills. Through the mediation of one of their own functions, half of patients can be cured, especially new diseases. Good mood plays an important role in the result, including laughing. Laughter is a good emotional response, which can not only expand the lungs and promote blood circulation, but also eliminate a kind of nervous tension that is harmful to health. Therefore, we must maintain a healthy emotional state in order to promote health.