It feels good to laugh. Early humans laughed long before they could talk. Beyond the feeling of goodness, it actually helps your health.

It gives you a natural high, lighting the reward centre of your brain and releases those feel-good chemicals—endorphins and dopamine. Laughter can be the best form of Medication. These are the same chemicals that trigger the high people get from drugs.
You don’t always have to laugh to jokes or humour. People laugh even when there’s nothing funny
Research suggests we use laughter to connect with others or show understanding. And you are 30 times more likely to laugh when you are with others than when you are solo.

Laughter is a form of exercise. Just 10 minutes of it can burn up to 40 calories. And it raises your heart rate up to 20%. If you laughed 15 minutes a day, you could laugh off nearly 2 kilos of excess weight a year.
In addition to helping your heart, laughter can ease pain. The endorphins released in laughter help deal with pain better.

http://medfort.com.ng/laughter-can-be-the-best-form-of-medication/