In a nutshell
A joint may grind or produce several fine cracking sounds during movement. This is called crepitus and differs from a single loud knuckle crack. Without pain, swelling, or loss of function, the sound alone does not establish a diagnosis.
Why does it happen?
Sounds can result from soft tissue and joint surfaces gliding. Changes in cartilage and bone may also be involved, but cartilage condition cannot be reliably inferred from loudness.
Frequency
Joint sounds also occur in many people without joint disease. Their frequency depends on the joint, movement, and age.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Painless grating is common.
When to seek advice
Have pain, swelling, redness, or limited movement assessed.
Does this happen to you?
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Sources (1)
- Merck Manual: Joint Noises (opens a new tab)
Places joint sounds in context with and without other symptoms.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
