Big Toe Numbness: It Could Be Your Lower Back – CSC

Video What does it mean when your big toe is numb

A Numb Big Toe Could Be an Early Warning Sign…

Big toe numbness – while it might not be particularly common, or even that concerning—it’s just a toe after all— when your big toe goes numb, it can certainly get your attention. And for good reason; it’s usually an early warning sign that something more significant is going on.

You should be especially concerned if it’s happening often or in on-again-off-again episodes and with certain activities. The good news is, addressing it when you first start to notice it may save you from more advanced damage in the future.

Numbness in toes can be caused by circulation problems or a nerve issue in the toe itself, but more often than not, the low back is the culprit. This is especially the case if it’s not just numb but there is pain and numbness in the big toe. Let’s look at the link between the low back and big toe.

Big Toe Numbness and Your Low Back

Believe it or not, one of those significant issues that can present as numbness stems from the low back. In the lumbar spine, the nerve that exits the spine at the L5 level branches down through the hip, thigh, knee, lower leg, and, yes, all the way into the foot and toes. So a pinched or irritated nerve at that L5 level in the back can create problems, such as pain, numbness, tingling, and so on, anywhere along the nerve branch.

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So what can irritate the L5 spinal nerve? The list is long, but it includes disc issues, such as herniated or bulging discs; arthritis in the spinal joints (inflammation can put pressure on the nerves); back injuries; foraminal stenosis, which is when the channels that the nerves run through narrow (and can be caused from any of the above); and so on.

Interestingly, your back may not even hurt if you have a pinched or irritated spinal nerve. The body works in fascinating ways, and big toe numbness may be the body’s way of throwing up an early warning flag to let us know there’s danger up ahead if we don’t intervene now. Numbness today may be big toe pain and stiffness tomorrow. Next thing you know you’ve developed bunions (bone spurs), you have knee pain (maybe even progressing arthritis) due to stability issues, and more damage is being done to the spine you never had checked, which keeps the damage cycle in motion.

Learn more by watching the brief video below:

While low back issues are a common instigator of a numb toe, there are other issues that could be at play.

Other Causes of a Numb Big Toe

Direct Compression

A shoe or boot that is too small or laced too tight may cause numbness.

Big Toe Arthritis

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Swelling, bunions, and bone spurs in the big toe may cause nerve compression and numbness (1).

Peripheral Nerve Injury

Peripheral neuropathy is a condition where the nerves that transmit the electrical signal from the spine to the rest of the body become damaged or diseased. This nerve injury can result in numbness or weakness in the upper and lower extremities. There are many causes of peripheral nerve injury which include diabetes, poor circulation, auto-immune diseases, chemotherapy, poor nutrition, trauma, and alcoholism .

Nerve Entrapment

As nerves exit out of the spine, they branch into the hip, posterior thigh, knee and ankle, and toes. Nerves can become compressed as they twist through narrow areas in the lower extremity. Examples include the common peroneal nerve as it winds around the knee bones and the tibial nerve as it descends across the ankle. These are examples of common peripheral entrapments that can result in numbness and weakness.

Big Toe Numb and Other Issues

Arthritis in the big toe is less likely to cause numbness and more likely to make the toe stiff or painful. Bunions themselves, which are often caused by a low back issue, can put pressure on surrounding structures and create big toe numbness in the process. Tendon injuries should also be considered when tracing the source of the numbness, especially when other symptoms are also present, such as alternating pain and numbness.

With arthritis of the big toe, a big toe fusion, which involves fusing two or more toe bones together to make them immovable or removing and replacing the big toe join, is often the surgical solution. These invasive major surgeries result in lengthy recovery times and can create more problems than they solve.

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The flexor hallucis longus tendon can also become injured. This tendon stretches along the underside of the big toe, and damage to it can cause stiffness in the toe. You may also experience symptoms as far up as your ankle. If your numbness has progressed to pain and even debilitation, this tendon needs to be considered.

When Conservative Measures Fail

If conservative measures, such as rest and physical therapy, are unable to address your big toe numbness, it’s time to have your toe examined by an interventional orthopedic physician who can determine the source. Whether it’s the lower back, the big toe itself, or both, an injection of platelet growth factors may be all you need to address the problem.

In order to address your problem, it’s important that you don’t delay examination. It’s best find the source and treat it quickly before that early warning signal becomes a full-on train wreck. Surgery is typically a much less than ideal solution, so it’s a good idea to seek nonsurgical regenerative medicine solutions first, like at our clinic, Centeno-Schultz Clinic.

In Conclusion…

Big toe numbness can be caused by many factors which include tight shoes, toe arthritis, damage to peripheral nerves, nerve entrapment and low back injuries. A thorough evaluation is important if you have a significant past medical history including diabetes, and or, poor circulation. If your numb big toe comes and goes, and is associated with impact activities such as lifting and running, a back injury with nerve irritation may be responsible. Early evaluation and treatment is best before additional injuries occur.


  1. Geletka BJ, O’Hearn MA, Courtney CA. Quantitative sensory testing changes in the successful management of chronic low back pain. J Man Manip Ther. 2012 Feb;20(1):16-22. doi: 10.1179/2042618611Y.0000000014. PMID: 23372390; PMCID: PMC3267442.
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