Does clubfoot cause back pain?

Q: Can clubfoot cause lower back pain?

Not as a rule, on the only direct evidence there is. What can contribute is a measurable leg length difference, which is a separate thing that some people with clubfoot have and most do not. Leg length discrepancy is associated with low back pain in the wider literature, and the differences that come with clubfoot are usually under a centimeter, which is within the range a great many people have anyway.

One study has ever asked this question directly, and it found that back pain was not more common in people with clubfoot. Not overall, and not in the groups you would expect: not those with residual deformity, not those who limped, not those with a leg length difference. That study is from 1975, it has 93 people in it, and nobody has repeated it. Everything on this page sits between those two facts.

Written by Heath, who has lived it: casts from birth, a fusion at sixteen, the US Army, and distance running.

The only study

What it found, in full

Ninety-three people with congenital talipes equinovarus were investigated, with the question being whether low back pain was more frequent in them and whether it tracked the state of the foot.1 The group was not a mild one.

88 percentOf the feet still had some residual deformity.1

One thirdHad a difference in the length of the lower extremities.1

One fifthWalked with a limp.1

No increaseThe frequency of low back pain, and of back pain leading to sick compensation, was not raised compared with the whole population of the same age group.1

And then the part that does most of the work. The authors looked within the group as well, and found no over-representation of back pain among those with residual deformity, among those who limped, or among those with a leg length discrepancy.1 The three things everybody assumes are the mechanism were each checked, and none of them separated the people with back pain from the people without it.

The honest caveat

What a 1975 paper with 93 people can and cannot carry

A page that quoted that study and stopped would be doing the same thing as a page that ignored it. So here is the other side, and it is substantial.

Ninety-three peopleLarge enough to rule out a dramatic effect. Not large enough to rule out a modest one, or to say anything reliable about small subgroups.

Fifty-one years oldThe treatment those adults had was the treatment of the 1920s to 1950s, which is not the treatment children get now. The feet are not the same feet.

Never replicatedNot confirmed and not overturned. In a field with thousands of clubfoot papers, nobody has asked this question again.

Absence of evidenceWhat the study supports is that there is no large, obvious excess of back pain. It does not prove your back pain is unrelated to your foot.

The mechanism people assume

Where leg length actually fits

The chain everybody has in mind runs: different foot, uneven legs, tilted pelvis, sore back. The first link is where it usually breaks, because in clubfoot a smaller foot is near universal and a genuine leg length difference is not. Where a real difference does exist, the wider literature does associate it with back pain: a systematic review of shoe lifts records leg length discrepancy as associated with low back pain, scoliosis, and osteoarthritis of the hip and knee.2 A 2026 study of 220 standing full-length x-rays found a difference of a centimeter or more went with uneven arthritis between the two hips.4

The differences that come with clubfoot are almost all below the range where walking mechanics have been shown to change. That is why the useful question is not whether you have clubfoot but whether you have a measured difference, and how big.

There is one more fork worth knowing about, because it decides who should be treating you. A pelvis can sit tilted because a leg is short or because of something in the spine itself, and a systematic review of pelvic obliquity gives the test that separates them: stand on blocks until the pelvis levels. A tilt that corrects points at the limb. Deformity that persists despite the correction points at the spine.5

Measuring leg length properly → Whether the hips are involved → Pain by where it actually is →

The intervention people reach for

Does a lift help a sore back?

If there is a real difference, this is the thing most people try, and the evidence is genuinely encouraging and genuinely weak at the same time. Both halves matter.

88 percent improvedAcross non-randomized studies, 88 percent of 349 participants treated with a shoe lift had partial or complete pain relief, with individual study results ranging from 66.7 to 100 percent.2

The one trialAll 22 randomized participants who received a lift improved, with a mean pain reduction of 27 millimeters on a 150-millimeter scale.2

Rated very low or poorThe reviewers’ own verdict on the quality of the evidence, noting the correction strategy was often described inadequately.2

Size decides itA separate review of insoles found they reduced pelvic drop and spinal compensation when the difference was moderate or severe, and were not reliably useful when it was small. Every study in it reported a significant reduction in back pain.3

Read those together and the instruction is clear enough. A lift is worth trying for a measured difference of a size that warrants it, with someone who knows what they are correcting. It is not worth self-prescribing for a leg that feels shorter, which is one of the most commonly self-applied and least helpful things people do to their own backs. The reviewers themselves say the threshold worth correcting has still not been established.2

If your back hurts

What to actually do with all that

The evidence above adds up to a short and unglamorous list.

Have the leg length measured rather than estimated. Clinically from the pelvis to the ankle, on blocks until the pelvis levels, or on imaging. Eyeballing someone lying down is not a measurement.

Get a number before anyone puts anything in your shoe. If there is no measured difference, a lift is not the treatment for your back.

Do not let the clubfoot end the conversation. Back pain is common in people with ordinary feet, and having a lifelong condition does not exempt you from the usual causes, or from the usual assessment.

Take the red flags seriously regardless. Pain with numbness, weakness, or changes in bladder or bowel control is not a foot question and is not a wait-and-see question.

Clubfoot and back pain

Does clubfoot cause back pain?

One study has ever asked the question directly and the answer it got was no. Ninety-three people with congenital clubfoot were examined, 88 percent of the feet still had some residual deformity, a third had a difference in leg length and a fifth walked with a limp. The frequency of low back pain, and of back pain severe enough to result in sick compensation, was not increased compared with the general population of the same age. Back pain was not over-represented in the group with residual deformity, in the group who limped, or in the group with a leg length difference.1 That study is from 1975 and nobody has repeated it.

Can clubfoot cause lower back pain?

Not as a rule, on the only direct evidence there is.1 What can contribute is a measurable leg length difference, which is a separate thing that some people with clubfoot have and most do not. Leg length discrepancy is associated with low back pain in the wider literature,2 and the differences that come with clubfoot are usually under a centimeter, which is within the range a great many people have anyway.

Why does my back hurt if only my foot is different?

It may not be the foot. Back pain is extremely common in people who have nothing at all wrong with their feet, and the trap with any lifelong condition is assuming it explains every symptom that arrives afterwards. The honest position is that having clubfoot does not exclude the ordinary causes of back pain and does not automatically explain it either. If there is a mechanical link in your case it usually runs through a real, measured leg length difference rather than through the foot itself.

Will a heel lift help my back pain?

Only if you have a measured difference worth correcting, and the evidence is better than nothing rather than strong. A systematic review of shoe lifts in adults found that 88 percent of 349 participants in non-randomized studies had partial or complete pain relief, and that all 22 participants in the single randomized trial improved, with a mean pain reduction of 27 millimeters on a 150-millimeter scale. The same review rated the study quality as very low or poor and called for research establishing what size of difference is worth correcting at all.2 A separate review of insoles found they reduced pelvic drop and spinal compensation when the difference was moderate or severe, and were not reliably useful when it was small.3

Can foot problems cause back pain?

They can contribute, and the route is usually the pelvis rather than the spine directly. The complication is that a pelvis can sit tilted because one leg is genuinely shorter or because of something in the spine itself, and those are managed differently. A systematic review of pelvic obliquity settles it with a simple test: stand on blocks until the pelvis levels. If the tilt corrects, it points at the leg. If deformity persists despite correction, it points at the spine.5

Should I get my back scanned because of my clubfoot?

Having clubfoot is not on its own a reason for spinal imaging. Back pain is assessed on what it is doing rather than on a condition you were born with, and most back pain does not need a scan at all. What is worth doing, if you have one-sided clubfoot and persistent back pain, is having the leg length actually measured rather than estimated, because that is the one link with evidence behind it and it is cheap to check.

Sources

Where this comes from

1 Bjönness T. Low back pain in persons with congenital club footScandinavian Journal of Rehabilitation Medicine, 1975 2 Campbell TM, et al. Shoe lifts for leg length discrepancy in adults with common painful musculoskeletal conditions: a systematic review of the literatureArchives of Physical Medicine and Rehabilitation, 2018 3 Menez C, et al. Effects of insoles on gait kinematics and low back pain in patients with leg length inequality: a systematic reviewJournal of the American Podiatric Medical Association, 2023 4 Aprato A, et al. Moderate leg length discrepancy: a long-term risk factor for hip osteoarthritis?Journal of Orthopaedics and Traumatology, 2026 5 Truumees E, et al. Differentiating spinal deformity versus leg length discrepancy in patients with pelvic obliquitySpine, 2026

Keep going

Next in this cluster

One leg shorter than the other →Four different things get called a short leg, and only one is a length difference. Pain by location →Where adult clubfoot pain actually turns up, and what each place tends to mean. Does it affect the hips →The joint between the foot and the back, and what the follow-ups found.