Answer:
Believe it or not, but:
Laughter decreases stress hormones and increases immune cells and infection-fighting antibodies, thus improving your resistance to disease. Laughter triggers the release of endorphins, the body's natural feel-good chemicals. Endorphins promote an overall sense of well-being and can even temporarily relieve pain.
It basically means that laughing can make a person feel better when there down or in an emotional state.
Step-by-step explanation:
Hope it helps! =D