Foot pain may be a telltale sign of an underlying spinal condition.
This article looks at which foot pain symptoms may point back to your spine, and when it is worth getting checked.
It also gives an overview of common spinal conditions that can cause pain, numbness, tingling or weakness that travels into the foot.
Your spine is a little like a signal tower, sending messages throughout the body all day long.
When you feel pain in your foot, the first thought is usually something obvious: tight shoes, too much standing, a hard workout, a cranky bunion or maybe one of those “why did I wear these?” high-heel moments.
And yes, foot pain can absolutely come from the foot itself. As noted by the Mayo Clinic’s list of foot pain causes, heel spurs, bunions, ingrown toenails, tendinitis, arthritis, fractures and nerve problems can all be part of the picture.
But sometimes the foot is not the real starting point. Sometimes it is the messenger.
Pain, tingling, burning, numbness or weakness in the foot can come from irritation of nerves in the lower back, especially when symptoms travel from the back or buttock down the leg. That is where spinal conditions, and especially sciatic nerve irritation, enter the conversation.
How to Know if Your Foot Pain is Caused by Spinal Conditions
Foot pain that comes from a spinal problem often has a different “personality” than pain from a local foot injury. It may feel electric, burning, sharp, shooting or numb rather than just sore in one spot.
Here are some clues that your foot pain may be more than just a foot problem:
- Foot pain on only one side: Spinal nerve irritation often affects just one side of the body. That is because a compressed nerve in the lower back can travel down one leg and into the foot.
- Leg pain along with foot pain: Pain that starts in the lower back or buttock and travels down the thigh, calf or foot is a classic clue that a nerve may be involved.
- Tingling, burning or numbness: These symptoms are often nerve-related. They may show up in the toes, top of the foot, heel or outside of the foot, depending on which nerve root is irritated.
- Difficulty lifting the front of your foot: Trouble raising the foot or toes can point to weakness from a lower back nerve problem. This is sometimes called foot drop, and it deserves medical attention.
- Difficulty walking on your tiptoes: Trouble pushing off the toes may happen when certain nerve roots are affected. You may also notice weakness in the calf.
- Your foot feels heavy: A heavy, dragging or clumsy foot can happen when nerve signals are not getting through the way they should.
- Pain changes with back position: Symptoms that get worse when sitting, bending, coughing or standing for a long time may be linked to the spine.
These symptoms do not automatically mean you have a serious spinal condition. But they are good reasons to stop guessing and get an exam.
More urgently, seek medical care right away if you develop new weakness, loss of bladder or bowel control, numbness in the groin or inner thighs, fever, unexplained weight loss or severe pain after a fall or injury. Those are not “wait and see” symptoms.
The Key Symptom: Sciatica
The symptom most people have heard of is sciatica.
Sciatica is pain that travels along the path of the sciatic nerve, which runs from the lower back through the buttocks and down the leg. It can reach the calf, ankle, toes or bottom of the foot, because nerves do not care that we drew neat little body-part maps in anatomy books.
To be clear, sciatica is not usually the main diagnosis. It is a symptom caused by something irritating or compressing a nerve, such as a herniated disc, spinal stenosis or degenerative changes in the lower back.
The National Institute of Neurological Disorders and Stroke notes that low back pain can involve nerves that affect the lower body, including pain that travels into the leg. That traveling pattern is one reason foot symptoms can sometimes send us back to the spine.
Sciatica is most often felt on one side. Depending on where the nerve is irritated, symptoms may show up in different parts of the leg and foot.
Underlying Conditions of Sciatica Pain
Now that we have talked about the symptom, let’s look at what may be behind it.
Here are six common spinal conditions that can be related to foot pain, numbness, tingling or weakness.
1. Lumbar Herniated Disc
One common underlying spinal condition linked with sciatic-type foot pain is a herniated disc.
The discs in your spine act like cushions between the bones of the spine. When one of those discs bulges or herniates in the lower back, it can press on a nearby nerve root and cause symptoms that travel down the leg and into the foot.
This can cause pain, numbness, tingling or weakness. In some cases, a person may have more leg or foot pain than back pain, which is what makes the whole thing a little sneaky.
2. Lumbar Spinal Stenosis
Spinal stenosis happens when the spaces in the spine narrow and place pressure on the spinal cord or nerves.
In the lower back, this can lead to pain, cramping, numbness or weakness that travels into the buttocks, legs or feet. Reports from the American Academy of Orthopaedic Surgeons also note that symptoms may get worse with standing or walking and feel better when sitting or leaning forward.
Lumbar spinal stenosis is more common as people age, because wear-and-tear changes in the spine can narrow the space around nerves. Treatment may include physical therapy, exercise modification, medication, injections or, in more severe cases, surgery.
3. Spondylolisthesis
Spondylolisthesis occurs when one vertebra slips forward over the bone below it, often in the lower back.
Some people have no symptoms at all, while others may develop back pain, leg pain or nerve symptoms that travel into the foot. When the slipped vertebra narrows the space around a nerve, sciatic-type pain can show up.
This is one of those conditions where symptoms can vary quite a bit. A mild case may be managed conservatively, while a more severe or unstable case may require a specialist’s input.
4. Lumbar Degenerative Disc Disease
Degenerative disc disease sounds dramatic, but it basically means the discs in the spine have changed over time. They can lose hydration, flatten, crack or become less effective as shock absorbers.
These changes are common with age, and not everyone with disc degeneration has pain. But when the changes irritate nearby nerves or contribute to a herniated disc, symptoms can travel into the leg and foot.
This is also why an MRI finding by itself does not always tell the full story. The question is whether the imaging, physical exam and symptoms all match up.
5. Facet Joint Arthritis
Facet joints help the spine bend, twist and move with some control. Like other joints in the body, they can develop arthritis when cartilage wears down.
Facet joint arthritis can cause lower back pain, stiffness and inflammation. In some cases, bony overgrowth or swelling around these joints can narrow the spaces where nerves exit the spine.
When that happens, irritated nerves may cause pain, tingling or numbness into the buttock, leg or foot. Not exactly the kind of “joint effort” anyone asked for.
6. Osteoarthritis
Osteoarthritis occurs when cartilage between joints breaks down over time. It can affect the knees, hips, hands, feet and, yes, the spine.
In the lumbar spine, osteoarthritis may contribute to inflammation, stiffness, bone spurs and narrowing around nerves. Those changes can increase the odds of sciatic-type symptoms or foot pain coming from the back.
Important to note: osteoarthritis can also affect the foot directly. This is why a good exam matters, because the source of pain is not always obvious from symptoms alone.
Get Your Foot Pain Diagnosed
Now that we’ve gone through the common spinal-related symptoms and conditions, you may have a better sense of why foot pain sometimes starts in the back.
That does not mean every ache, cramp or twinge in the foot is coming from your spine. But foot pain with radiating leg pain, numbness, tingling or weakness should be evaluated.
A physician, physical therapist, podiatrist, orthopedic specialist or chiropractor may assess your symptoms, test your strength and reflexes, check your range of motion and decide whether imaging or nerve testing is needed.
When foot pain is caused by a local problem, treatment may look very different than when it is caused by nerve irritation in the back. That is exactly why getting the right diagnosis matters.
You may also consider turning to a chiropractor near you or a chiropractor in your area to evaluate whether your foot pain may be connected to your spine. He or she can discuss treatment options, including non-surgical approaches, depending on your specific situation.
Many of my patients and potential patients also are not aware they can see a chiropractor without insurance. You always have the option to pay out-of-pocket for your visits.
The bottom line: listen to the signals your body is sending. Foot pain may be a simple foot issue, but when nerve symptoms enter the picture, your back may be part of the story.
About Dr. Brent Wells
Dr. Brent Wells, D.C. has been a chiropractor for over 20 years and has treated thousands of patients.
He founded Better Health Chiropractic & Physical Rehab in Alaska in 1998 and is a member of the American Chiropractic Association and the American Academy of Spine Physicians.
Dr. Wells is also the author of over 700 online health articles that have been featured on sites such as Dr. Axe and Lifehack. He created the Alaska Back Pain Protocol, which has helped thousands say goodbye to back pain.
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