Ever wondered why cracking your knuckles feels good?
Cracking your knuckles feels good because it stretches the joint and stimulates the nerve endings found there. Synovial fluid present in our joints acts as a lubricant which contains the gases oxygen, nitrogen, and carbon dioxide. When you crack knuckles, you stretch the joint capsule which releases the gas and the gas forms a bubble and it collapses and pops.
Here is a short video for better explanation
***This was originally posted by me on Quora, here is the link to the original answer: https://www.quora.com/Why-does-cracking-your-knuckles-feel-good/answer/Prashant-Gonga ***