Is it normal for your knee to pop?

Medically reviewed by a licensed physicianLast reviewed 2026-08-28

A knee that clicks, pops or crunches is one of the symptoms people most often decide to look up — usually not because it hurts, but because nobody has told them whether it should worry them.

This page does not tell you whether your knee is fine. It cannot: that requires examining you. What it can do is explain what those noises generally are, what would make them worth attention, and what a physician would want to know.

What knee popping and clicking may mean

Knees can make clicking, popping, snapping or grinding sounds for several different reasons. The sound may come from movement of a tendon or other soft tissue, changes in the joint surfaces, the patellofemoral joint, a meniscus, or other structures moving as the knee bends and straightens.

The same type of sound can therefore occur in very different situations. The noise by itself does not identify what is happening inside the knee.

When it is usually not a problem — and what changes that

A knee sound by itself does not automatically mean that the joint is being damaged, particularly when it occurs without pain, swelling, locking, instability or loss of function.

When the sound is accompanied by any of those symptoms, follows an injury, or represents a new and persistent change in how the knee behaves, it deserves a different level of attention.

What makes it more concerning

A pop or click is more concerning when it occurs with pain, recurrent swelling, locking or catching, the knee giving way, or a new inability to move the joint normally. A loud pop at the time of an acute injury followed by swelling or loss of function should also be evaluated.

And his general list, which applies to any knee:

Fever, spreading redness, rapid deterioration, or an acutely cold, pale or painful extremity.

Any of those means urgent medical attention, not a website.

What a physician looks for

This is the list the physician who reviews cases here asks for:

Which joint is involved, how long it has been a problem, what they have tried, what they have been told about surgery if anything, and whether imaging already exists.

With a noisy knee, what matters most is what comes with the noise. A sound on its own and a sound with pain, swelling or the knee giving way are different pieces of information.

What you can do next

Write down what happens around the noise, not just the noise. Whether it hurts, whether the knee locks or gives way, whether anything swells afterwards, and what movement produces it.

Gather any imaging you already have. You do not need to obtain new studies before someone looks at your case.

And if any of the concerning signs above apply, do that first and today.

If you are trying to understand what may be causing your knee symptoms or what options may be reasonable to discuss, you can request a medical review.

This page is general information and is not medical advice. It does not diagnose your condition, does not establish a physician-patient relationship, and is not a substitute for being examined.