When Clicking or Grinding in the Knee Is a Sign of a Bigger Problem
Published by Dr Oliver Khoo at Tuesday, April 14, 2026
You bend your knee and hear a click. Or maybe there’s a grinding sensation when walking up stairs or standing from a seated position. It’s surprisingly common — and in many cases, completely harmless.
But not always.
Knowing the difference between normal knee sounds (known as crepitus) and signs of a deeper issue can help you avoid long-term damage and get the right treatment early.
Let’s break it down in a way that actually makes sense.
Crepitus is the medical term used to describe clicking, popping, or grinding sounds in a joint.
In the knee, this can happen for several normal reasons:
If the sound is:
…it’s generally nothing to worry about.
Many people experience this occasionally, especially during exercise or after long periods of sitting.
The key difference between harmless crepitus and a potential problem is what comes with it.
If your knee clicking or grinding is accompanied by other symptoms, it could indicate underlying pathology.
Here are the most common conditions linked to problematic knee sounds:
As cartilage wears down, the smooth surfaces of the joint become rough. This can create a grinding sensation.
You might notice:
This occurs when the kneecap (patella) doesn’t track properly over the femur.
Symptoms include:
The meniscus acts as a cushion in your knee. Tears can cause clicking or catching.
Signs to watch for:
While less commonly associated with grinding, ligament injuries can still cause instability and abnormal movement.
Not all knee noises are equal. Some are your body’s way of saying, “Something’s not right.”
Watch out for these red flags:
If you’re experiencing one or more of these, it’s worth getting assessed.
One of the most common questions is: Should I get a scan?
The short answer: not always — but sometimes, yes.
If your symptoms are mild and there are no red flags, a clinician may recommend:
Imaging becomes more useful when:
X-ray
MRI
Ultrasound
It’s important to remember: imaging should support a clinical diagnosis — not replace it.
Ignoring persistent knee symptoms can lead to:
Early assessment allows for:
Even something that feels minor now can develop into a bigger issue if left unchecked.
The right treatment depends entirely on the cause — but most knee issues respond well to conservative care.
A tailored program can help:
This doesn’t mean stopping movement — just adjusting it.
For example:
Hands-on techniques can improve mobility and reduce discomfort.
Only considered when conservative treatments don’t work or in more severe cases (e.g. significant meniscus tears or advanced arthritis).
Knee clicking or grinding isn’t automatically a problem — but it shouldn’t be ignored if it’s paired with pain, swelling, or instability.
Think of it like this:
If something feels off, trust that instinct. Early action can make all the difference.
Yes, knee clicking without pain is very common and usually harmless. It often happens due to normal joint movement or gas bubbles in the joint fluid.
Grinding during squats may be due to patellofemoral joint stress or cartilage wear. If it’s painless, it’s often not serious — but pain should be assessed.
You should seek help if you have pain, swelling, locking, instability, or if symptoms are getting worse over time.
It depends on the cause. While cartilage loss can’t be fully reversed, symptoms can often be significantly improved with the right treatment and strengthening.
Not always. Many cases can be diagnosed clinically. An MRI is usually only needed if symptoms persist or if a more serious injury is suspected.
In most cases, yes. Exercise is beneficial — but it should be appropriate for your condition. If there’s pain, it’s best to get guidance.
