What damaged hip cartilage actually feels like

The pain that hip cartilage damage produces tends to sit deep in the groin, at the front of the thigh, or in the buttock — not at the outer hip where muscular or tendon problems more often announce themselves. It worsens with loading: climbing stairs, walking any distance, or prolonged sitting can all bring it on, and it rarely settles completely with rest. That persistence — even when sitting quietly — is one of the earlier signals that the joint surface, rather than the surrounding muscle, is the source.

Morning stiffness is common. The hip feels restricted for the first few minutes after waking or after a long period of inactivity, then loosens slightly with movement, only to ache again once activity is sustained. This cycle of gelling and easing is a recognisable pattern that patients often describe before they have any imaging to explain it.

Mechanical symptoms — clicking, catching, locking, or giving way on rotation — point more specifically to cartilage or labral pathology than to muscle or tendon pain. A sensation of something shifting or catching inside the joint, rather than a generalised ache around it, is worth noting when describing symptoms to a clinician.

On examination, an antalgic limp and progressive restriction of hip range of motion help distinguish chondral lesions from surrounding soft-tissue causes. Unlike a pulled muscle or an inflamed tendon, cartilage damage does not tend to resolve with rest alone — symptoms usually accumulate gradually rather than settling between episodes.

Why hip cartilage fails and cannot heal on its own

Several distinct mechanical failures can set cartilage damage in motion, and the most clinically common is femoroacetabular impingement (FAI). In cam-type FAI, an abnormal bony prominence on the femoral head repeatedly grinds against the acetabular rim during flexion and rotation; in pincer-type FAI, an over-covering acetabulum pinches the labrum and the underlying cartilage with each movement. Either variant strips cartilage from the acetabular side over time through repetitive abrasion rather than a single injury.

Other upstream causes accelerate the same destructive cycle: direct trauma or falls, labral tears that destabilise the joint surface, hip dysplasia where shallow socket geometry concentrates load on a narrow area, osteonecrosis where blood supply to the femoral head fails, and age-related thinning that progressively reduces the protective layer.

What none of these triggers can reverse is the inherent biology of cartilage tissue. Because articular cartilage is avascular — it has no blood vessels to deliver repair cells — even modest surface damage cannot be patched by the body's usual healing response. The degenerative cycle therefore tends to self-perpetuate, which is why early assessment is more useful than waiting for pain to settle on its own.

What the clinical examination involves

Before any scan is requested, a consultant hip specialist will work through a structured clinical history: where exactly the pain sits, when it began, what triggers or eases it, whether mechanical symptoms such as locking or catching are present, and which everyday activities — putting on shoes, getting up from a low chair, climbing stairs — have become difficult. This narrative shapes the clinical suspicion before the patient changes for examination.

Physical assessment covers hip range of motion in all planes, with particular attention to internal rotation, which is often the first movement to become restricted in intra-articular pathology. Two provocation tests do much of the discriminating work. The FADIR test (Flexion, ADduction, Internal Rotation) compresses the anterior joint space and reproduces groin pain when cartilage or labral tissue is irritated — a positive result strengthens the case for intra-articular damage. The FABER test (Flexion, ABduction, External Rotation) stresses the posterior capsule and sacroiliac joint in a different plane. Gait is observed throughout: an antalgic limp — one that shortens the stance phase on the painful side — is a straightforward examination finding that points toward joint-surface rather than muscular pathology.

Patient-reported outcome measures such as the Hip disability and Osteoarthritis Outcome Score (HOOS) or the international Hip Outcome Tool (iHOT-33) can quantify how much the hip is affecting daily life and sport at baseline, providing a reference point against which any treatment response is later measured. These tools are used variably across specialist hip services.

From plain X-ray to MRI: the imaging pathway

Imaging for suspected hip cartilage damage follows a logical sequence, with each modality answering questions the previous one cannot.

Plain X-ray

A weight-bearing AP pelvis and lateral hip radiograph is almost always the starting point. It identifies joint space narrowing — a proxy for cartilage loss — bony morphology that may suggest cam or pincer-type FAI, and any frank bony injury. What plain X-ray cannot do is image cartilage tissue itself; a hip with significant chondral damage can appear deceptively normal on radiograph, which is why a normal X-ray does not exclude cartilage pathology.

Conventional MRI

MRI is the primary soft-tissue investigation and carries no ionising radiation. Early cartilage degeneration appears as chondral hyperintensity and loss of the normal grayscale stratification of cartilage layers. For focal chondral lesions, published sensitivity ranges from around 58% to 83% — useful, but not definitive.

MR arthrography

Where focal chondral or labral pathology is specifically suspected, MR arthrography — in which gadolinium contrast is injected directly into the joint before scanning — improves diagnostic accuracy substantially. Sensitivity for cartilage defects rises to roughly 71–92%, with one large series reporting a sensitivity of 79% and specificity of 77% for cartilage defects specifically. The contrast medium distends the joint capsule, making small surface irregularities more visible.

Even with arthrography, one injury pattern remains difficult to detect: cartilage delamination, where the cartilage layer separates from the underlying bone without a surface breach. Published sensitivities for delamination range from as low as 22% to 74%, which is why hip arthroscopy — providing direct visual access to the joint surface — remains the definitive diagnostic standard when imaging findings and clinical suspicion do not align.

Quantitative MRI techniques

Specialist centres may use dGEMRIC (delayed gadolinium-enhanced MRI of cartilage) or the SHOMRI whole-joint scoring system to characterise cartilage biochemistry and predict how the joint may respond to preservation procedures. These tools are not routine NHS investigations but can be valuable in complex or borderline cases at dedicated hip units.

Cartilage grading and what the grades mean in practice

Clinicians use the ICRS (International Cartilage Repair Society) grading system to describe how deeply a lesion penetrates the cartilage layer. Understanding the grades helps patients make sense of what an imaging report or consultant letter is actually saying.

• Grade 1 — the cartilage surface is softened or shows minor fissuring but remains structurally intact. Often found incidentally and may produce mild, intermittent symptoms.
• Grade 2 — damage extends into less than half the cartilage thickness. The surface is clearly disrupted but a substantial layer of healthy tissue remains beneath.
• Grade 3 — the lesion reaches beyond 50% of the cartilage depth. Sub-grades (3A through 3D) reflect whether the damage has extended to the calcified cartilage zone or reached the surface of the underlying bone. This is often where patients begin to notice consistent, activity-limiting pain.
• Grade 4 — full-thickness loss, with the subchondral bone exposed. This corresponds to the bone-on-bone changes visible on a plain X-ray.

Grade alone does not determine the treatment pathway. Lesion area matters equally: a small Grade 3 defect (under roughly 2–4 cm²) sits in different clinical territory from a large one of the same depth. Lower-grade, smaller lesions may respond well to activity modification, injection therapies, or minimally invasive options. Larger or deeper defects tend to shift the conversation toward cartilage restoration procedures; in end-stage cases with diffuse loss, hip replacement becomes the more realistic discussion. Age, activity demands, and the condition of the surrounding joint all feed into that decision alongside the grade itself.

Getting assessed at Lincolnshire Hip

For patients based in Lincolnshire or the wider East Midlands, the Lincolnshire Hip assessment pathway runs in three straightforward steps.

Step 1 — Discovery call. The process begins with a no-obligation telephone conversation with a non-medical member of the team. This is an opportunity to describe your symptoms, ask practical questions about the service, and work out whether an in-person consultation is the right next move — before committing to anything.

Step 2 — In-person consultation. Professor Paul Lee sees patients at MSK House in Sleaford and at The Keep Clinic in Grantham. At this appointment he takes a full clinical history, carries out a physical examination, and identifies which imaging investigations are clinically indicated. Imaging is arranged at this stage rather than requested in advance, which means the choice of scan — and whether one is needed at all — is guided by what the examination actually finds.

For most patients, the imaging step can be completed at MSK House without a separate hospital visit. The site has on-site Open MRI, which is also suitable for patients who cannot use a standard closed-bore scanner due to claustrophobia or restricted mobility.

Step 3 — Imaging review and personalised plan. Once results are available, Professor Lee reviews the findings and confirms the recommended pathway. As with any specialist private clinic, the specific approach to each patient is decided on clinical grounds at consultation rather than through a fixed published algorithm — that flexibility is how the plan reflects the individual rather than a template.

Where surgery is indicated, it takes place at Weymouth Street Hospital in London; all pre- and post-operative care, including physiotherapy, is delivered locally in Lincolnshire.

Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment.