Could Your Hip Be Causing Your Knee Pain? Understanding Referred Pain

If your knee has been evaluated and treated without full relief, the actual source of your pain may be your hip, not your knee at all. Here is how that happens and how it gets sorted out.

How can hip problems cause pain that feels like it’s in the knee?

This is a recognized pattern called referred pain. The hip joint and the knee share overlapping nerve pathways, so irritation or degeneration in the hip, most commonly from osteoarthritis, can be perceived as pain in the front of the knee rather than in the hip itself. A published case series described patients referred specifically for knee pain who were ultimately found to have hip arthritis as the actual cause, with knee symptoms resolving after the hip itself was treated. This is exactly why an evaluation that only examines the knee can miss the real driver of your symptoms.

What symptoms suggest the hip might be involved?

Groin pain, outer thigh pain, or buttock pain alongside your knee symptoms is one of the more reliable clues that the hip may be contributing. Stiffness getting in and out of a car, difficulty putting on socks or shoes, or pain that changes with hip rotation rather than knee movement are also worth mentioning to your provider. Some patients have only knee pain with no groin or thigh symptoms at all, which is part of why this pattern can be genuinely easy to miss without a provider specifically considering it.

Why might knee imaging or treatment not explain the whole picture?

If your knee X-ray or MRI shows only mild changes, or knee-focused treatment hasn’t provided the relief expected, that mismatch between findings and symptoms is itself a useful clue. It suggests the knee may not be the primary source of your pain, even if it is where you feel it most. This is one of the more common reasons patients end up with ongoing knee symptoms despite appropriate knee-directed care, and it is a specific pattern providers are trained to recognize when the pieces don’t quite fit together.

How does a provider check whether the hip is the actual source?

A hip exam includes checking your hip’s range of motion, particularly internal rotation, which is often one of the first movements to become limited and painful with hip osteoarthritis, along with specific provocative maneuvers that can reproduce referred knee pain when the hip is the true source. Your provider will also ask about groin, thigh, or buttock symptoms specifically, since patients don’t always volunteer this information if they assumed their knee was the only relevant area. Hip imaging may be recommended if the exam raises suspicion, even if your primary complaint is knee pain. Imaging rarely settles a referred-pain question on its own, as discussed in what an MRI can and cannot show for knee pain.

What does treatment look like once the hip is identified as the source?

Treatment shifts to address the hip directly rather than continuing to focus on the knee. Depending on severity, this can include hip-focused physical therapy, activity modification, and non-surgical technologies like shockwave therapy for appropriate candidates. In the case series noted above, several patients experienced full resolution of their knee pain after their hip was treated, underscoring how directly connected these two patterns can be. For more advanced hip arthritis that doesn’t respond to conservative care, a referral for a surgical opinion on the hip itself may be appropriate.

What if I’ve already had knee treatment without full relief?

If you have already tried physical therapy, injections, or other knee-focused treatment without the improvement you expected, that pattern itself is worth mentioning at your next evaluation. A partial or incomplete response to appropriately targeted knee treatment is one of the signals that can prompt a provider to look more closely at the hip as a possible contributing or primary source, rather than concluding that your knee simply hasn’t responded to care yet. Where the driver sits further up the chain, therapy has to follow it, which is discussed in whether physical therapy helps knee pain.

Are there other joints that commonly refer pain to the knee?

The hip is the most common source of referred knee pain, but it is not the only possibility. Lower back conditions affecting certain nerve roots can occasionally produce pain felt in the front of the knee as well, following a similar principle of shared nerve pathways. This is part of why a thorough evaluation considers the whole lower body rather than examining the knee in isolation when symptoms don’t fully add up.

Frequently asked questions

Can I have both a hip problem and a real knee problem at the same time?
Yes, this is possible, which is part of why a full evaluation matters rather than assuming only one joint is involved.

Is referred knee pain from the hip common?
It is more common than many people expect, and case reports have specifically documented patients referred for knee pain who were ultimately diagnosed with hip arthritis.

Will treating my knee directly help if the problem is actually my hip?
It may provide some temporary relief, but lasting improvement typically requires addressing the actual source, which in this pattern is the hip.

What age group does this pattern usually affect?
It is most commonly seen in adults with hip osteoarthritis, which tends to become more common with age, though it can occur in younger adults with hip pathology as well.

Do I need a referral to be evaluated for this?
It depends on the insurance plan. Some require a primary care referral before a specialist visit and some do not, so it is worth checking first.

Take the next step

If knee pain has not fully made sense, the hip may be the missing piece. An evaluation of the whole chain, not just the knee, is what usually explains it.

Source: “Don’t forget the hip! Hip arthritis masquerading as knee pain,” case series.