More than just brightening up your day, sharing a good laugh can actually improve your health. The sound of laughter draws people together in ways that trigger healthy physical and emotional changes in the body. Laughter can reduce stress, anxiety, and depression, strengthen your immune system, and diminish pain. As children, we used to laugh hundreds of times a day, but as adults life tends to be more serious and laughter more infrequent. By seeking out more opportunities for humor and laughter, though, you can improve your emotional health, strengthen your relationships, find greater happiness—and even add years to your life.

Source:  HelpGuide