Knee noises

Written by Dr Sheila Strover on March 14, 2025

Knee noises may be normal in the knee or may signify problems, depending upon the nature and trigger for the noise.

Crepitus

Crepitus is a fine crackling feeling, which one can feel through your hand on your knee while bending and straightening the knee. It can also be audible.

Sometimes it is less of a sound and more of a feeling. It is not specific of anything but really just a sign that the knee is not fully healthy, and is commonly felt with all types of arthritis. Experts suggest that crepitus is the result of fine air bubbles in the joint.

Back to top

Clicking

Clicking is a soft sound, often not particularly uncomfortable, and which may be associated with certain movements.

It may arise from a damaged meniscus or a meniscus that is not quite standard in anatomy.

Back to top

Patellar clunk

A patellar clunk is an occasional deep noise and feeling which may occur after some knee replacements.

The clunk arises with bending and straightening the knee from a  fibrotic nodule or lump of scar tissue at the top pole of the patella and the lower part of the quadriceps tendon.

Back to top

Snapping

Snapping is a sharp noise and discomfort as a tendon or a fold of joint lining (plica) snaps over a bony area.

Back to top

Crepitus, Clicking, Patellar clunk, Snapping