When you laugh, it doesn’t only lighten your mental tension but also induces physical changes in your body. Laughter improves your oxygen-rich air intake; it provides stimulation to your heart, lungs and muscles. Laughter also increases the endorphins secretion from your brain. An improved immune system is a long term benefit of laughter. Negative thoughts manifest into chemical reactions. These reactions can impact your body by bringing more stress. It also leads to a weakening of your immunity. On the other hand, positive thoughts release chemicals that help fight stress and potentially more serious illnesses. Laughter also helps in making difficult situations much easier.