Condition

Cartilage damage

Damage to the joint surface itself, often after an injury rather than from age. Cartilage cannot repair itself, which is what makes the pattern of damage worth establishing properly.

This page explains the condition. It does not recommend a treatment, because that depends on your joint rather than your diagnosis label.

Two knee joints: one contained cartilage defect on the left, wear spread across the surface on the right
The same diagnosis covers two very different pictures. Which one you have changes the answer.

In plain English

What is actually happening

Cartilage has no blood supply and no nerve supply. That combination explains a great deal: it cannot heal itself the way skin or bone can, and damage to it is not directly painful.

Damage can be an injury, a twist or an impact that takes a piece out of the surface, or it can be gradual wear. It can also follow surgery elsewhere in the joint. Removing a meniscus, for example, concentrates load onto cartilage never designed to absorb it, and osteoarthritis commonly follows within five to twelve years.

What matters clinically is not just that there is damage, but its shape: one contained area, or wear spread across the whole surface. Those two pictures suit different treatments.

Common symptoms

What people usually describe

You will not have all of these, and having them does not confirm the diagnosis.

Pain in one specific spot

Often localised rather than a general ache through the whole joint.

Swelling after activity

The joint reacts to load, then settles with rest.

Catching or clicking

A sensation of something snagging inside the joint as it moves.

Pain that followed an injury

A twist, an impact or a sporting incident that the joint never quite recovered from.

Worse on impact

Running, jumping and stairs hurt more than flat walking.

Confidence in the joint

Avoiding certain movements, even without genuine instability.

Or is it something else

How this differs from similar problems

Generalised morning stiffness

Stiffness across the whole joint that eases as you move usually points at osteoarthritis rather than a discrete cartilage defect.

True locking

A joint that genuinely locks in position may have a loose fragment or a meniscal tear, and needs assessing before any injection is considered.

Pain around the joint, not inside it

Tendon and ligament problems sit outside the joint and behave differently. They are a different treatment conversation.

Imaging

What imaging adds

MRI is what shows cartilage. It maps where the damage is, how deep it goes, and whether the bone underneath is involved.

This is the point of the scan for cartilage damage: it distinguishes one contained defect from broad surface wear. Those look similar from the outside and are not treated the same way.

It also shows whether the rest of the joint is mechanically sound. A treatment that works on the surface will not hold up in a joint that is unstable or badly aligned, and knowing that beforehand prevents a wasted procedure.

A knee MRI displayed on a clinical monitor
A clinician examining a patient’s knee in a consultation room

Where it sits

On the spectrum of wear

Healthy
Early wear
Diffuse wear
Bone on bone

Cartilage damage can sit anywhere on this range, and the pattern matters more than the label.

What may be discussed

Treatments that tend to come up

Not a recommendation. These are the options a doctor may raise for this condition, and which one fits is decided on examination and imaging.

Limits

When an injection is not enough

We offer four injections and nothing else. These are the situations where the honest answer sits outside them.

  • The joint is unstable, or a ligament is not doing its job
  • There is a loose fragment or a meniscal tear causing true locking
  • Significant malalignment is driving load onto the damaged area
  • The damage is extensive and the joint has effectively run out of surface

Urgent

When to seek help sooner

These are not injection-clinic problems. If any apply, contact your GP, NHS 111 or an emergency department rather than booking with us.

  • A joint locked in position that you cannot straighten
  • Sudden giving way that causes falls
  • A hot, swollen joint with fever, which needs urgent assessment
  • Severe pain immediately after an injury, with inability to weight-bear

Questions

Common questions

Can cartilage repair itself?
Not meaningfully. It has no blood supply, which is exactly why treatments in this area focus on giving your own cells a structure or a starting point to work from.
Does the size of the defect decide whether I can be treated?
Less than people expect. Candidacy depends more on whether the joint environment can support a repair response than on the size of the defect or your age.
I had a meniscus removed years ago and my knee hurts now. Is that related?
Very possibly. The meniscus spreads a large share of the load across the knee, and once it is gone that force concentrates onto cartilage that was not built for it.
Which joints can be treated?
Cartilage damage is treatable across many joints, including the knee, hip, ankle, shoulder, elbow, wrist, hand and thumb. Which of our four treatments is available for your joint is confirmed at assessment.

Related

Find out what your joint actually needs.

An assessment looks at the joint, your imaging and what you want back, then tells you which of the four fits, or whether none of them does.

An older couple dancing together at home

Last reviewed 27 July 2026

General information only. It does not replace an individual clinical assessment, and it is not a diagnosis.

Sources for this page
  • amsk.co.uk/insights/which-joints-chondrofiller-can-treat
  • amsk.co.uk/insights/cartilage-profiles-unsuitable-for-chondrofiller-injection
  • amsk.co.uk/insights/knee-arthritis-after-meniscus-surgery
  • amsk.co.uk/insights/chondrofiller-injection-vs-knee-cartilage-surgery