Hip Pain: Where It Actually Comes From, and What Helps

The question that sorts most hip pain out

When someone tells me their hip hurts, the first thing I want is not a scan. It is a finger pointing at the exact spot.

"Hip" is one of the least precise words in medicine. People use it for the groin, the outer thigh, the buttock and the lower back — four regions with completely different causes and completely different treatments. Getting this wrong is the single most common reason someone arrives having had months of treatment aimed at the wrong structure.

So before anything else: where exactly does it hurt?

Groin pain — this is usually the joint

Pain felt deep in the groin, sometimes wrapping toward the front of the thigh, is the classic presentation of a problem inside the hip joint itself.

Typical features:

• It is worse with weight-bearing — walking, standing, rising from a low chair.
• Putting on socks and shoes becomes difficult, because that movement requires rotation.
• Getting in and out of a car is a flashpoint.
• Rotation is restricted, and a clinician will find that on examination even if you have not noticed it.

Hip osteoarthritis is the most frequent cause in older adults. In younger and more active people, the same area can be irritated by hip impingement, labral problems or muscle injury — which is why age and activity change the interpretation of identical symptoms.

Outer hip pain — this is usually not the joint

This is the one that gets mislabelled most often.

Pain on the bony point on the outside of the hip, particularly when it is worse lying on that side at night, is usually a problem with the gluteal tendons where they attach — not arthritis inside the joint.

It has a very recognisable pattern:

• Sleeping on that side wakes you.
• Sitting cross-legged is uncomfortable.
• Climbing stairs or standing on one leg to dress provokes it.
• Pressing directly on the bony point reproduces it exactly.

It was long called "trochanteric bursitis", which implied inflammation of a fluid sac and led naturally to injections. The current understanding is that in most cases the tendon is the primary problem, and that matters, because tendons respond to progressive loading rather than to rest — and repeated steroid injections into a tendon problem are not a harmless default.

Buttock pain — look at the back

Pain felt mainly in the buttock, especially if it travels down the leg, frequently originates in the lumbar spine or the sacroiliac joint rather than the hip.

Two clues point this way: symptoms that change with back position rather than with hip movement, and pain accompanied by numbness, tingling or weakness in the leg. A hip joint problem does not usually produce those.

This distinction is not academic. A hip that is being treated as a hip when the source is the back will not improve, and a back that is being treated when the hip is arthritic will not either.

What helps hip osteoarthritis before surgery

There is a persistent belief that once arthritis is on an X-ray, only replacement remains. That is not what the evidence supports, and it is not how I manage it.

Things that genuinely help:

• Strengthening, particularly the gluteal muscles and the quadriceps. A hip supported by strong muscles tolerates arthritis considerably better.
• Maintaining movement, because stiffness compounds the disability faster than the joint surface does.
• Managing load rather than stopping activity — swapping high-impact for low-impact, not giving up exercise.
• Weight management where relevant, since load through the hip is a multiple of body weight.
• Using a stick in the opposite hand during flare-ups, which reduces load through the painful hip substantially and is under-used because people find it embarrassing.
• Appropriate pain relief, discussed with a clinician, to make the above possible.

Many people run their hip successfully for years on exactly this.

What helps outer hip tendon pain

Different problem, different answer — and some of the standard advice is actively unhelpful here.

• Stop stretching it aggressively. Pulling the leg across the body compresses the tendon against the bone, which is the mechanism causing the problem. This is the most common well-intentioned mistake.
• Change the sleeping position. A pillow between the knees, and avoiding the painful side, often improves nights within a week or two.
• Avoid standing with the hip pushed out to one side, and avoid sitting cross-legged.
• Progressive loading, guided rather than improvised, is the treatment that actually resolves it — but it takes months, not weeks.

Warning signs that need prompt review

Most hip pain is mechanical and not urgent. Seek assessment promptly rather than waiting if you have:

• Hip or groin pain after a fall, particularly if you cannot weight-bear, which needs immediate assessment to exclude a fracture
• Fever with a hot, painful, very restricted hip, which is a medical emergency
• Pain that is constant, present at rest and at night, and unrelated to activity
• Unexplained weight loss, or a history of cancer, alongside new hip pain
• Progressive leg weakness or numbness, or any change in bladder or bowel function
• Hip pain in a child or adolescent, which is assessed differently and should not be assumed to be a strain

When replacement becomes the right conversation

Hip replacement is one of the most reliably successful operations in orthopaedics. That is precisely why it deserves a careful indication rather than an automatic one.

It becomes reasonable when the pain is significantly limiting daily life, when it disturbs sleep, when reasonable non-surgical measures have genuinely been tried, and when the X-ray findings match the symptoms. That last point matters: I do not operate on an X-ray, I operate on a person whose life is being restricted in a way that fits what the X-ray shows.

The honest framing is this. Replacement is very good at relieving arthritic hip pain. It is not a performance upgrade, it is not reversible, and the right time is when the hip is limiting you — not when a scan first shows wear.

What an assessment looks for

A proper hip assessment is largely clinical, and imaging supports it rather than replacing it.

• The exact location of pain, established with a pointing finger.
• Range of movement, especially rotation, compared with the other side.
• Whether pain is reproduced by moving the hip or by moving the spine — this is what separates hip from back.
• Single-leg standing and gait, which reveal gluteal weakness clearly.
• Direct palpation of the bony point, which is diagnostic for tendon problems.
• A screen of the lumbar spine, always, because referred pain is so common.

What we would do at IDUNN

We start by establishing which structure is actually generating the pain, because the three main patterns need three different plans and are frequently confused.

If it is the joint, the first conversation is about what can be achieved without surgery — strengthening, load management and pain control — and what realistic timelines look like. Replacement stays on the table as a considered option, discussed when it is genuinely indicated rather than raised at the first sign of wear.

If it is the gluteal tendons, we say so clearly, explain why stretching and repeated injections are not the answer, and put a progressive loading programme in place with the understanding that it takes months.

And if the source is the lumbar spine, we treat the spine — which is the reason we examine it in every hip assessment rather than only when the hip findings are confusing.

Why hip problems are often felt in the knee

This catches people out regularly, and it is worth knowing about.

The hip and the knee share nerve supply, and a hip joint problem can refer pain down to the front of the thigh and into the knee — sometimes so convincingly that the knee is where the person points and where all the attention goes.

The clue is that the knee itself examines normally. It is not swollen, it is not tender, its movement is full, and nothing done to the knee reproduces the pain. Meanwhile, rotating the hip does.

Two situations make this particularly important:

• In adults, someone can be investigated and treated for knee pain for months while the arthritic hip generating it goes unexamined.
• In children and adolescents, hip conditions frequently present as knee or thigh pain, and some of them are time-critical. Any child or teenager with knee pain and no knee findings should have their hip examined. This is not a subtle point of interest; it is the reason serious hip conditions in young people get missed.

The practical rule is straightforward. If the knee hurts but the knee examines normally, examine the hip.