2. You can get arthritis from cracking your knuckles.
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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.