2. You can get arthritis from cracking your knuckles.
The sounds we make when we stretch or bend our knuckles are because the fluid inside them gets too much pressure and vaporizes. This is a lubricant that saves us from pain or cracks in our joints and doesn’t have any defence mechanisms. There are a lot of studies that say knuckle cracking isn’t really related to arthritis. Having said that, you might need to stop because it can cause hand strength issues.