Does Knuckle Cracking Cause Arthritis?
Previous studies have NOT shown a link between knuckle cracking and hand osteoarthritis. One study even suggested that knuckle cracking helped prevent osteoarthritis. This study showed that 18.1% of those who cracked their knuckles regularly had hand osteoarthritis compared with 21.5% of those who did not crack their knuckles.
Journal American Board of Family Medicine, April 2011