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Cracking your knuckles is not as bad as people think. The usual argument is that knuckle popping causes arthritis. This does not happen. Chronic knuckle cracking may cause other types of damage, including stretching of the surrounding ligaments and a decrease in grip strength, but not arthritis.
So what causes the pop? The sound is produced in the joint when bubbles burst in the synovial fluid surrounding the joint.
From: Why Do Men Have Nipples? By: Mark Leyner and Billy Goldberg, M.D. |