OK, but could cracking your knuckles cause other forms of damage? There are isolated reports of accidental self-inflicted injury from knuckle-cracking, with injured thumbs and sprained finger ligaments, but these are rare.
So if you like cracking your knuckles then by all means carry on, but just bear in the mind the conclusions of the doctors who carried out the research in the LA nursing home. They said: “The chief morbid consequence of knuckle cracking would appear to be its annoying effect on the observer.”
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