Why outer hip pain is often misread as arthritis

Outer hip pain can feel convincingly like a joint problem — it is near the hip, it hurts with movement, and it sometimes interrupts sleep. The natural assumption is arthritis. In many cases, however, the hip joint itself is entirely uninvolved.

Hip joint arthritis affects the ball-and-socket articulation deep inside the groin. Its hallmark is pain felt in the groin or inner thigh, often with a noticeable loss of hip rotation when bending or turning the leg. Greater trochanteric pain syndrome (GTPS) — the clinical umbrella for lateral hip pain — behaves quite differently. The pain sits over the outer, bony prominence of the upper thigh (the greater trochanter), and hip rotation is frequently preserved. That distinction is a useful early pointer, even before any formal assessment.

GTPS arises from soft tissues on the outside of the hip: the small fluid-filled bursa and the tendons that attach there. The joint itself is not the source. Arthritis.org notes that bursitis is 'sometimes mistaken for arthritis because the pain occurs near a joint' — a straightforward explanation for why so many patients arrive at clinic convinced they have worn cartilage when the joint is structurally sound.

None of this means self-diagnosis is reliable. Pain location can overlap, and only a clinical assessment can confirm the origin. What it does mean is that outer hip pain alone is not a verdict on the joint.

What GTPS actually is

The term GTPS covers two related but distinct problems: trochanteric bursitis, which is inflammation of the small fluid-filled cushion (bursa) that sits over the outer hip bone, and gluteal tendinopathy — degeneration or partial tearing of the tendons that attach there. Both produce lateral hip pain; in most people who receive the diagnosis, the tendons are the primary culprit.

Those tendons belong to the gluteus medius and gluteus minimus muscles, which run from the pelvis down to the greater trochanter — the bony point you can feel if you press the outer side of your upper thigh. Their job is to keep the pelvis level during every step you take. When one leg lifts off the ground, these muscles fire to prevent the opposite side of the pelvis from dropping. When they are damaged or degenerated, that stabilising function falters, producing outer hip pain, noticeable weakness, and in more severe cases a characteristic dipping of the pelvis with each stride — known as a Trendelenburg limp.

For many years the condition was called simply 'trochanteric bursitis', and both names are still in everyday use. Modern imaging, however, has shown that isolated bursal inflammation without any tendon involvement is relatively uncommon. Recognising tendinopathy as the dominant pathology matters because it changes what treatment is needed: targeting only the bursa with an injection, or resting completely, may leave the tendon component under-treated. Effective rehabilitation generally involves controlled loading of the tendons — not just reducing inflammation.

Symptoms and what makes them worse

For most people, the pain announces itself in one of two ways: a sharp, localised ache directly over the outer bony point of the hip, or a duller discomfort that spreads down the outside of the thigh. Early on the sensation tends to be sharper and more intense; over weeks or months it often settles into a persistent, diffuse ache that is harder to pinpoint.

Many people find the most disruptive symptom is the pain that wakes them when lying on the affected side at night. Even rolling onto that hip briefly can be enough to cause discomfort, and some find that lying on the opposite side — with the affected hip uppermost — also aggravates things if the leg is allowed to drop inward. Disturbed sleep is frequently what prompts a first appointment.

During the day, symptoms are typically provoked by rising from a low chair after prolonged sitting, climbing stairs, sustained walking, squatting, and crossing the legs. That last posture — legs crossed at the knee — compresses the tissues over the greater trochanter and is a consistently reliable aggravating movement.

Critically, the pain stays on the outer hip. It does not sit in the groin or radiate into the inner thigh — those patterns point toward the joint rather than the peritrochanteric soft tissues. Symptoms vary considerably between individuals in intensity and pattern, and this picture alone is not a diagnosis. A formal clinical assessment is needed to confirm the source of the pain and rule out other causes.

Who tends to develop GTPS and why

GTPS most commonly affects women between the ages of 40 and 60 — estimates suggest it is roughly four times more prevalent in women than in men. Commonly cited population figures of around 1.8 per 1,000 adults per year are drawn from general Western data rather than confirmed UK-specific counts, so should be read as indicative rather than precise.

Several factors raise the likelihood of developing the condition. Repetitive loading activities — running, cycling, stair climbing, and prolonged standing — are among the most frequently identified. A direct fall onto the outer hip can trigger it more acutely. Underlying biomechanical factors such as a leg-length difference or a gait pattern in which the leg crosses the midline during walking place additional compressive load on the peritrochanteric tendons and bursa. Being overweight increases that load further. Rheumatoid arthritis and diabetes are associated comorbidities that may affect tendon tissue quality.

The profile matters in practice: a woman in her fifties presenting with lateral hip pain may readily assume she has the same joint problem as a parent or sibling who has had hip arthritis. Of the risk factors above, body weight and activity load are the ones most directly modifiable — and both are central to rehabilitation planning.

How GTPS is treated: from self-care to surgery

Recovery from GTPS moves through four broad stages, and understanding where each treatment fits helps set realistic expectations from the start.

Self-care and load management

The first step is not medication or clinic attendance but a change in daily habits. Compressive postures — crossing the legs, standing with all the weight shifted onto the affected hip, or allowing the top knee to drop inward when lying on the opposite side — place direct pressure on the peritrochanteric tendons and bursa and should be avoided consistently. Ice applied briefly to the outer hip can ease acute flare-ups, and paracetamol or an anti-inflammatory such as ibuprofen may provide short-term relief. Cushioned, shock-absorbing footwear reduces impact load on every step.

Physiotherapy

Physiotherapy is the cornerstone of evidence-based management, and it works through active loading rather than rest. Targeted exercises progressively strengthen the gluteus medius and minimus, rebuilding the tendon's capacity to tolerate load without aggravation. Patients who stop all activity expecting the tendon to settle on its own often find that symptoms persist or worsen; graded, guided loading is the mechanism through which tendons remodel and recover.

Injections

A corticosteroid injection into the trochanteric bursa can reduce pain sufficiently to allow rehabilitation to progress, but it targets inflammation rather than the underlying tendon degeneration. The LEAP trial (Mellor et al., 2018) — a randomised controlled trial comparing corticosteroid injection, education-plus-exercise, and a wait-and-see approach — found that exercise produced outcomes at least as good as injection by twelve months, reinforcing rehabilitation as the primary treatment. For refractory cases, shockwave therapy and platelet-rich plasma (PRP) injections targeting the gluteal tendons are used; head-to-head comparative data across injection agents remain limited.

Surgery

Surgical gluteal tendon repair is uncommon and reserved for confirmed full-thickness tears that have not responded to a thorough course of conservative management. When indicated, the torn tendon is reattached to the greater trochanter using surgical anchors. The majority of patients with GTPS do not reach this stage.

When to see a hip specialist

Several signals suggest it is time to move beyond self-management. If lateral hip pain has not settled after six to eight weeks of load management and GP-guided care, if night pain is regularly disrupting sleep, or if a limp has developed, a specialist assessment adds real value. Uncertainty about the diagnosis is itself a reason to be seen — particularly where groin pain, restricted rotation, or a previous hip history might point to a different cause entirely.

Assessment typically begins with clinical examination: palpation directly over the greater trochanter to localise tenderness, single-leg stance testing to detect gluteal weakness or a Trendelenburg pattern, and observation of gait. Ultrasound or MRI is requested where the clinical picture is unclear, or where a partial or full-thickness tendon tear needs to be confirmed or excluded. Imaging findings are then read alongside symptoms and examination — the clinical picture determines management, not the scan in isolation.

An early specialist opinion can avoid months spent on a programme that is not well matched to the actual diagnosis. Lincolnshire Hip is part of the MSK Doctors group and accepts patients without referral for hip assessment, with appointments available in Sleaford and Grantham.

1. [1] Greater trochanteric pain syndrome. https://en.wikipedia.org/?curid=7976648 https://en.wikipedia.org/?curid=7976648
2. [2] Bursitis - NHS. https://www.nhs.uk/conditions/bursitis/ https://www.nhs.uk/conditions/bursitis/
3. [3] Hip pain in adults - NHS. https://www.nhs.uk/conditions/hip-pain/ https://www.nhs.uk/conditions/hip-pain/
4. [4] Bill Vicenzino (Wikipedia). https://en.wikipedia.org/?curid=7914925 https://en.wikipedia.org/?curid=7914925