Get numbness in your feet evaluated promptly when it comes on suddenly, when it is much worse on one side, when it comes with real weakness, when there are autonomic changes such as lightheadedness on standing, or when it is progressing over days to weeks. American Family Physician names those same features as the reasons to refer a patient for electrodiagnostic studies, along with an initial workup that is normal while symptoms continue.1 Slow, symmetrical numbness in both feet is less urgent, but it still deserves a workup, because it is usually reporting a driver somewhere else in the body.
What to notice before your visit
- Numbness that is spreading or getting worse. A changing pattern suggests the driver is still active.
- Numbness plus weakness or autonomic changes. These are the features that move evaluation forward in the queue.
- A diabetes or prediabetes history. Peripheral neuropathy affects 25% to 50% of patients with diabetes, depending on age, years with diabetes, and control.1
- Known abnormal labs. B12, thyroid, and metabolic results shape which driver is most likely.
- Burning, heat, and night symptoms. Small-fiber patterns can be intense while standard testing looks unremarkable.
- Balance changes. Reduced protective sensation makes missteps more likely.
When numbness in the feet becomes urgent, and why
Numbness means nerve signaling is impaired. When the impairment progresses, it stops being only a sensation problem and becomes a safety problem — walking, heat sensitivity, and balance all depend on that feedback.
Worrisome patterns that support earlier evaluation
American Family Physician advises referral for electrodiagnostic studies when symptoms are worrisome, giving acute onset, asymmetry, predominantly motor or autonomic symptoms, and a rapidly progressive course as the examples, or when the initial workup is normal and symptoms persist.1
- Sudden or rapidly developing numbness
- Clear asymmetry, much more on one side than the other
- Prominent weakness rather than numbness alone
- Autonomic features such as lightheadedness on standing or changed sweating
- Progression over days to weeks
Numbness without pain still deserves evaluation
An epidemiological survey of 5,682 Japanese respondents, published in 2023, examined numbness that is not accompanied by pain, using the EQ-5D-3L and found that quality of life fell as numbness intensity rose.2 Notably, in that survey numbness of the feet and numbness in younger respondents were less likely to affect quality of life than numbness elsewhere.
That nuance is worth stating plainly: the absence of pain, and even a modest quality-of-life impact, is not evidence that the nerve is uninjured. It only means the symptom is quiet.
How common is peripheral neuropathy?
American Family Physician reports that the prevalence of peripheral neuropathy in the general population ranges from 1% to 7%, with higher rates among those older than 50 years.1 The range is wide, but the direction is consistent, and age raises the risk.
When the cause is not obvious
The same source notes that peripheral neuropathy is idiopathic in 25% to 46% of cases, and that this becomes more common with increasing age.1 A clean explanation may not appear at the first visit, which is what makes a structured evaluation worth the effort rather than a formality.
The diabetes context
Peripheral neuropathy affects 25% to 50% of patients with diabetes, depending on age, number of years with diabetes, and level of control.1 If diabetes is part of your history, numbness in the feet is a planning decision rather than a wait-and-see symptom, because metabolic drivers tend to progress quietly.
What we are actually mapping
Neuropathy is a category, not a diagnosis. The driver decides the direction of treatment, so the evaluation is built to name it rather than to confirm a label. Several of the drivers that get missed on a first pass are covered in our review of the hidden drivers behind peripheral neuropathy.
The questions that organize the map
- Is the pattern length-dependent, starting in the toes and moving up?
- Are the symptoms mostly positive, such as burning and tingling, or mostly negative, such as reduced sensation?
- Does the picture fit small-fiber involvement, with burning and altered temperature sensation?
- Is there metabolic risk that points toward a diabetic or prediabetic driver?
- Is there a nutritional, medication, or toxic exposure history that points somewhere else?
Testing that clarifies the driver rather than the label
Evaluation is decision-making. We want to know which nerves are involved, what is damaging them, and whether the mechanism looks metabolic, nutritional, toxic, autoimmune, or structural.
Initial laboratory evaluation
American Family Physician describes initial testing that includes a complete blood count, a comprehensive metabolic profile, and fasting blood glucose, thyroid-stimulating hormone, and vitamin B12 levels.1 Those results are read in context with the symptom pattern, never in isolation.
Electrodiagnostic testing: what it can and cannot do
Electrodiagnostic studies measure how well the larger nerve fibers conduct. They do not replace symptom-pattern analysis, and they cannot see the smallest fibers, but they can separate a normal-looking report from a measurable conduction failure. Electrodiagnostic testing (EMG/NCS) is performed on site at Regenerve.
Why burning feet at night can still matter when testing looks normal
Small-fiber symptoms often arrive first in metabolic neuropathy, including burning and altered temperature sensation. That is the situation people find most confusing, because the report can look unremarkable while the sensation is severe.
VNG balance testing when numbness comes with dizziness
VNG (videonystagmography) is a diagnostic test of inner-ear balance function, not a treatment. When numbness comes with dizziness or unsteadiness, it helps separate an inner-ear contribution from a nerve contribution so the plan targets the right system.
Why cause-first planning changes what you do next
The feet report first because the longest nerves carry the highest demands and depend on the longest supply route for oxygen and nutrients. When that supply is compromised, those fibers misfire first.
Diabetic peripheral neuropathy behaves as a microvascular and metabolic problem that happens to appear in the feet, which is why treatment aimed only at the sensation tends to leave the driver untouched.
What is offered here, described accurately
Class 4 photobiomodulation, class 3B cold laser, and whole-body infrared are offered in clinic alongside metabolic and nutritional care, guided by what the evaluation finds. Orthobiologic injections (PRP and BMAC) are offered as well. We do not promise nerve regeneration, reversal, or a cure, and we publish no success rate for any of it.
What you can do before your visit
- Inspect your feet daily with a mirror if protective sensation is reduced, so skin breakdown is found early.
- Write down the timing and progression, including whether burning is worse at night and whether symptoms are spreading.
- Note exposures, medications, and metabolic history, including diabetes status, nutrition, and any chemotherapy.
Where we are and how to start
Regenerve is located at 4477 Woodson Rd #104, St. Louis, MO 63134, minutes from St. Louis Lambert International Airport, and we see patients from across the St. Louis region, Missouri and Illinois. You can call or text (314) 886-5902, or email info@regenerve.com.
The free Nerve Damage Score is a five-question starting point that organizes the driver question before your appointment. If your numbness is new, worsening, or paired with any of the red flags above, do not wait on it.
Frequently asked questions
How do I know whether numbness in my feet is urgent?
Treat it as urgent when the onset is sudden, the numbness is clearly worse on one side, there is real weakness rather than only numbness, there are autonomic features such as lightheadedness on standing, or the change is progressing over days to weeks. American Family Physician lists exactly those features as reasons to refer for electrodiagnostic studies.1 See the symptom patterns we look for in the feet.
Do I need an EMG or nerve conduction study if I only have numbness?
Not always. Electrodiagnostic testing earns its place when the symptoms are worrisome, or when the initial workup is normal and the symptoms persist. That testing is performed on site here, so the decision is about whether the result will change the plan. See which specialist to see when neuropathy has not improved.
What laboratory tests are usually part of the first workup?
American Family Physician describes initial testing that includes a complete blood count, a comprehensive metabolic profile, and fasting blood glucose, thyroid-stimulating hormone, and vitamin B12 levels.1 Those results point toward a metabolic, nutritional, or thyroid driver rather than confirming a label. See why a “normal” B12 result can still be misleading.
Can burning feet at night be small fiber neuropathy?
It can. Burning and altered temperature sensation often appear early in metabolic neuropathy, and standard nerve conduction studies can look unremarkable while symptoms are intense, because those studies do not measure the smallest fibers. See small fiber neuropathy symptoms and testing.
Where does Qutenza fit into treating numb or burning feet?
Qutenza (capsaicin 8% patch) is FDA-approved in adults only for neuropathic pain from postherpetic neuralgia and from diabetic peripheral neuropathy of the feet. Any other neuropathy driver would be off-label use. It is applied in clinic by a clinician, never dispensed for home use, and repeated no more often than every three months. See how Qutenza is used in clinic.
Sources
- Castelli G, Desai KM, Cantone RE. Peripheral Neuropathy: Evaluation and Differential Diagnosis. American Family Physician. 2020;102(12):732-739. https://www.aafp.org/pubs/afp/issues/2020/1215/p732.html (general-population prevalence of 1% to 7%; idiopathic in 25% to 46% of cases; 25% to 50% of patients with diabetes; initial laboratory evaluation; criteria for electrodiagnostic referral).
- Nagai S, Niwa H, Terajima Y, et al. The Relationship between Numbness and Quality of Life. Journal of Clinical Medicine. 2023;12(4):1324. https://doi.org/10.3390/jcm12041324 (epidemiological survey of 5,682 Japanese respondents; quality of life declined as the intensity of numbness without pain increased, with foot numbness and numbness in younger respondents less likely to affect quality of life).