Laughter is the best medicine.
If you dispute that, then you, as an infant, must have sucked lemon juice from your mom’s tits, or suffer from congenital constipation.
From a purely medical standpoint, laughter decreases stress hormones and increases immune cells and infection-fighting antibodies, thus improving your resistance to diseases.
It triggers the release of endorphins which promote an overall sense of well-being and can even temporarily relieve pain. Endorphins are the body’s natural feel-good chemicals.
Caution: Too much of everything, however, is not good – even laughter.