How common is knee clicking and grinding in knee osteoarthritis?

Knee osteoarthritis changes the joint surfaces and surrounding tissues over time. When the knee bends, these changes can produce clicking, crackling, or grinding, known as crepitus. The sound may occur with stiffness, aching, reduced flexibility, or swelling, especially after activity or after sitting still.

A noisy knee does not show how severe osteoarthritis is on its own. Some people have sounds without much pain, while others notice discomfort and reduced function. A clinical assessment considers symptoms, movement, strength, alignment, and any injury rather than relying on noise alone.

Choose activities that keep the knee moving without repeatedly causing a pain flare. Walking on a manageable route, cycling, water exercise, and strengthening may be useful options, adjusted to your abilities. Pace tasks, take short breaks, and avoid suddenly increasing loads on the knee.

Arrange an assessment when clicking is painful, function is declining, swelling recurs, or everyday activities become harder. A clinician or physiotherapist can help tailor strengthening, mobility work, weight-bearing choices, and pain strategies to your goals.

Seek prompt care after an injury if the knee cannot bear weight, becomes rapidly swollen, locks, gives way, or appears deformed. A hot, red, very painful knee with fever also needs urgent assessment because infection is possible.

What could be causing my knee sounds and pain? Which exercises are suitable for my current function? How should I pace walking or stairs? What symptoms mean I should return sooner?