Health
Is Cracking Your Knuckles Harmful?
Health Points
- Cracking your knuckles does not cause arthritis or permanent joint damage.
- The popping sound is due to gas bubbles in joint fluid bursting.
- Forceful cracking or pain during the action can lead to injury and should be avoided.
Many people find cracking their knuckles satisfying, while others consider it bothersome or even worrisome. It’s a familiar habit with plenty of opinions surrounding its comfort, social acceptability, and long-term impact on joint health.
Growing up, you may have heard warnings that the habit could make your knuckles larger or arthritic. Alternatively, some believe it helps keep joints limber, sparking curiosity about what’s actually true.
“Research shows that the cracking sound is from gas bubbles in the joint bursting or collapsing,” says Dr. Natalie Azar, NBC News medical contributor and rheumatologist.
Joints such as the knuckles, called metacarpophalangeal (MCP) and proximal interphalangeal (PIP), contain synovial fluid where these gas bubbles can form and pop.
Dr. Azar notes, “It’s likely related to differences in anatomy, the mechanics of the joint movement, as well as the characteristics of the joint fluid,” when explaining why some fingers pop more easily than others.
Cracking your knuckles is safe for most people and does not cause joints to change shape or increase your arthritis risk. However, forceful or painful manipulation should be avoided since it can lead to injury.
“Some people who engage in very vigorous knuckle cracking, however, have been reported to suffer from tendon or ligament injuries, or even dislocations,” Dr. Azar explains.
One study even involved a researcher cracking only one hand’s knuckles twice a day for fifty years with no resulting arthritis.
Dr. Azar says that while there are no proven health benefits, knuckle cracking can provide momentary stress relief for some, making it a soothing habit rather than a harmful one.
If you feel pain, swelling, or stiffness after cracking joints, it’s wise to see a healthcare professional.
Keep in mind, experts advise against self-manipulating more delicate joints like the neck or back due to higher risk for serious injury; always seek guidance from a medical professional before attempting these at home.
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