You’ve got a sore knee, but you can’t remember twisting it, falling on it, or banging it on anything. That is more common than most people expect. Sometimes the knee is where you feel the pain, and the hip is where it begins.
This article explains why that happens and what clues point toward the hip. It is general education, not a diagnosis. If your knee hurts, check in with your doctor or a physical therapist about your own situation.
Why does hip pain show up in the knee?
Hip pain shows up in the knee because the hip joint and the knee share nerve pathways, and your brain can misread where a signal is coming from. This is called referred pain. The pain is real, but the spot that hurts is not the spot that is causing the trouble.
Nerves that serve the hip joint also send branches down the thigh toward the inner knee. When the hip is irritated, the brain can map that signal to the knee. Think of it as a wrong address on a package.
That is why rubbing, wrapping, or bracing the knee sometimes does nothing. You may be treating the place that hurts instead of the place that is driving it. It does not mean your knee is always fine. Both joints can be sore at the same time, and a hands on exam is the way to sort that out.
The hip and knee work as one chain
Even without nerve confusion, the hip and knee are linked by muscle and movement. The hip sets the position of the thigh bone, and the knee sits right below it. If the hip is stiff or weak, the knee often takes up the slack.
Here is a simple example. When you walk down stairs, your hip muscles help keep your knee lined up over your foot. If those muscles tire early, the knee may drift inward with each step. Over weeks, that extra stress can leave the knee irritated even though the knee structures themselves were never injured.
Therapists often describe this as a chain. A problem at one link can show up at the next. The hip muscles, the thigh muscles in front and back, and even the ankle all play a part. This is general movement science, and it is why a knee exam often includes looking above and below the joint.
Clues that your knee pain may start in the hip
Several patterns make a hip source more likely, though none of them prove it. Knowing them helps you describe your pain clearly to a professional.
- No injury you can point to. The knee began aching without a twist, fall, or hit.
- Pain in the groin, buttock, or outer hip. You may also feel a deep ache or stiffness there, especially after sitting.
- Pain on the inner thigh or just above the knee. It feels vague, spread out, and hard to pinpoint with one finger.
- Stiffness getting out of a chair or car. The first few steps feel tight.
- A normal looking knee. There is no swelling, warmth, or clicking, but it still hurts.
A true knee problem often has its own signs, like swelling, catching, locking, or pain that sits right on one spot. Those point back toward the knee. Our patient education on the knee covers common knee conditions if you want to compare.
Everyday habits that can stress the hip
Daily routines can quietly wear on the hip, and the knee then complains. Long stretches of sitting are a common one. Sitting keeps the hip bent for hours, and the muscles at the front of the hip can tighten. When you stand, the hip may not extend fully, and that changes how you walk.
Other habits matter too. Always crossing the same leg, standing with weight on one side, or walking with a short stride can shift load around. Weak buttock muscles are a frequent partner in this picture, because they help steady the pelvis with every step.
Sports and yard work play a role as well. Quick sprints, sudden stops, and side to side cutting can strain the muscles around the hip and thigh. Our hip education pages describe injuries such as quadriceps strains and groin strains, which come from those kinds of movements and can leave pain in the thigh.
None of this means your habits caused your pain. It means small changes in how you move can be worth discussing with a therapist.
Arthritis, age, and the hip
Arthritis in the hip is a classic cause of pain that is felt in the knee. As the hip joint wears, the ache can travel down the thigh, and some people notice the knee long before they notice the hip.
That matters for older adults, and for anyone looking after an older parent. If a parent says their knee hurts but the knee looks fine, it is reasonable to ask about the hip too. Ask whether the pain is worse after sitting, whether putting on socks or shoes has gotten harder, and whether they limp or avoid stairs.
Stiffness and reduced range of motion are good things to mention. They are clues a therapist can measure. We see joint pain and arthritis at Total Rehab, and we offer balance and fall prevention, which can matter when pain changes how someone walks. Always bring these concerns to a doctor first if the pain is new, severe, or getting worse.
How a physical therapist sorts out the source
A physical therapist generally looks at the whole leg, not only the sore spot. In a typical exam, that may include watching how a person walks and stands up, and noticing which movements bring the pain on.
The goal is to work out whether the hip, the knee, the back, or a mix is involved. Low back problems can refer pain toward the leg as well, which is a different story from hip referral, though the two can overlap. Sciatica is one common example of back related leg pain.
Our care is described as individualized, so a plan depends on what you and your therapist find together. Approaches we name include therapeutic exercise, stretching and strengthening exercises, manual therapy, and patient education. Our hip education pages list possible treatments such as hip range of motion work, core strengthening, gait or walking training, and proprioception exercises. No result can be promised, and a therapist chooses among these based on you.
When to get it checked, and where to go in Auburn
Get it checked when knee pain lingers, keeps returning, or changes how you walk. Some situations call for a doctor right away: a fall followed by an inability to bear weight, a hot swollen joint, fever, or sudden severe pain. Do not wait on those.
For ongoing aches without a clear cause, a physical therapist is a sensible next step. Total Rehab Solutions does not require a referral, so you can start by asking. If you live or work near South College Street, the South College clinic is at 1907 South College Street Ste 208, Auburn, AL 36830, and the phone number is (334) 649-3399. You can also use the Appointment Request form on the website, and we will contact you about scheduling.
If you are not sure which clinic suits you, our Glenn Avenue clinic at 2515 E. Glenn Avenue #104 is also in Auburn, at (334) 821-2256.
A knee that hurts for no clear reason is not a mystery to ignore. It is a good prompt to look one joint up the chain.
Frequently asked questions
Can an exam miss a hip problem?
It can if the exam focuses only on the knee. Because pain can be referred, a thorough evaluation usually considers the hip and sometimes the low back too. Tell your provider if you also feel groin, buttock, or outer hip discomfort.
Will stretching my knee help if the cause is my hip?
Probably not much. If the source is the hip, working only on the knee may leave the real problem untouched. A therapist can show you which movements suit your situation, so you are not guessing.
Do I need a doctor’s referral to see a therapist?
No. Total Rehab Solutions states that no referral is required. You can request an appointment through the website form or call your nearest clinic, and still see your doctor about anything severe or sudden.
Is this different from knee pain caused by arthritis?
It can be. Knee arthritis causes pain in the knee joint itself, while referred pain comes from elsewhere. They can also exist together, which is another reason a hands on exam helps.
Related pages
This article draws on the following pages.