Why Joints Crack & Pop: Causes, Safety, & When to Worry

This podcast delves into why joints crack and pop, a common occurrence medically termed crepitus. It explains that these sounds are often caused by gas bubbles forming and releasing in the synovial fluid that lubricates the joints, or by ligaments and tendons stretching and moving over bony structures.

The sources emphasize that cracking knuckles is generally considered safe and does not cause arthritis. Similarly, self-cracking the neck or back is usually harmless, though professional adjustments should be left to licensed chiropractors or physical therapists, acknowledging a very small, rare risk of stroke with neck manipulation. There is no evidence that cracking the neck or back causes disc degeneration.

Key indicators to worry and seek medical care include pain, swelling, or potential fluid build-up accompanying the cracking. These symptoms might signal an underlying problem like osteoarthritis (due to cartilage wear and tear), bursitis, meniscus or ligament injuries, or plica syndrome. Constantly feeling the need to crack a joint due to chronic stiffness or tension could also be a sign to consult a doctor.

To help prevent or manage joint noises, the overview recommends staying active and engaging in regular exercise (as "motion is lotion"), gentle stretching, and maintaining good posture. Other remedies for pain include massage, heat, or cold. Some individuals may crack joints as a self-soothing mechanism for anxiety, which can be addressed with mindfulness strategies or professional help.