Overview
- New guidance reported today reiterates that there is no strong evidence linking habitual knuckle cracking to arthritis.
- Doctors explain the audible pop as harmless cavitation in synovial fluid rather than bones grinding.
- Medical review is advised if cracking is accompanied by pain, swelling, warmth, reduced motion, locking, deformity, or persistent discomfort.
- The habit is widespread, with reports citing studies that about 54% of people crack their knuckles, often several times a day.
- Experts note that properly guided exercise can ease arthritis symptoms, and one clinician promotes stem cell–based therapies for selected patients, a single-source claim with limited supporting evidence.