A burning sensation in your feet is most often caused by nerve damage, a condition called peripheral neuropathy. Diabetes is the single most common cause, but the list of possibilities ranges from vitamin deficiencies and alcohol use to kidney disease, certain medications, and even tight footwear compressing a nerve. The burning typically starts in the toes or soles and can worsen at night, sometimes accompanied by tingling, numbness, or a pins-and-needles feeling.
Diabetic Neuropathy
High blood sugar is the leading cause of nerve damage in the feet worldwide. Among people with diabetes, the prevalence of neuropathy ranges from about 7% within the first year of diagnosis to 50% in those who have had diabetes for 25 years or more. When subclinical nerve changes are included, the number may exceed 90%.
The mechanism is straightforward in concept: prolonged high blood sugar triggers a cascade of chemical reactions inside nerve cells. These reactions increase oxidative stress, generate toxic byproducts called advanced glycation end-products, and activate inflammatory pathways. Over time, the smallest nerve fibers in your feet degrade. Because these small fibers carry pain and temperature signals, the earliest symptom is often a burning or prickling sensation in the soles, especially at night when you’re off your feet and there’s less competing sensory input.
If you have diabetes or prediabetes and notice new burning in your feet, it’s worth checking your blood sugar control. Tightening glucose management is the most effective way to slow further nerve damage.
Small Fiber Neuropathy
Not all neuropathy shows up on standard nerve conduction tests. Small fiber neuropathy specifically affects the thin nerve endings in your skin that detect pain and temperature, and it’s a common reason for burning feet when routine testing comes back normal. In healthy people, a skin biopsy at the lower leg typically shows about 9.8 nerve fibers per millimeter. In small fiber neuropathy, that density drops to around 4.4 fibers per millimeter.
Small fiber neuropathy can be caused by diabetes, autoimmune conditions, or sometimes no identifiable cause at all (called idiopathic). The burning tends to be symmetric, affecting both feet equally, and it often comes with an exaggerated pain response to light touch. A skin punch biopsy, usually taken from the ankle area, is the most reliable way to confirm the diagnosis.
Vitamin Deficiencies
Your nerves need B vitamins to maintain their protective coating and function properly. Vitamin B12 deficiency is a well-established cause of peripheral neuropathy, and low levels of B1 (thiamine) and B6 can also trigger burning feet. People at higher risk include vegans and vegetarians (B12 is found almost exclusively in animal products), those who’ve had weight-loss surgery, heavy drinkers, and older adults whose absorption declines with age.
Interestingly, too much B6 can also cause neuropathy. Some people who take high-dose B6 supplements develop the same burning and tingling they’d get from a deficiency. Research has found that patients with elevated B6 levels and no other explanation sometimes present with small fiber neuropathy as their only finding. The takeaway: more isn’t always better with supplements, and a blood test can clarify whether your levels are too low, too high, or somewhere else entirely.
Alcohol-Related Nerve Damage
Heavy, long-term alcohol use damages nerves through two overlapping pathways. First, alcohol and its breakdown products are directly toxic to nerve fibers. Animal studies have shown that nerve degeneration occurs even when thiamine levels are kept normal, confirming a direct poisoning effect. Second, chronic drinkers frequently develop thiamine deficiency because alcohol interferes with nutrient absorption and dietary habits tend to suffer. Most cases of alcoholic neuropathy involve both mechanisms working together.
The burning typically develops gradually in both feet and progresses upward. Reducing or stopping alcohol intake can halt further damage, and thiamine supplementation often helps, but nerve recovery is slow and sometimes incomplete.
Kidney Disease
When your kidneys lose the ability to filter waste products from your blood, those toxins can accumulate and damage peripheral nerves. This is called uremic neuropathy, and studies using nerve conduction testing have found it in roughly 45% of patients with end-stage kidney disease. About a third of those patients have noticeable neurological signs like burning, numbness, or weakness in the feet and lower legs. Dialysis can improve symptoms by clearing some of the toxic buildup, but it doesn’t always reverse existing nerve damage.
Medications That Cause Burning Feet
Several classes of medication can trigger peripheral neuropathy as a side effect, with chemotherapy drugs being the most common culprits. Six major groups of cancer treatments are known to damage peripheral nerves:
- Platinum-based drugs (used for solid tumors) cause neuropathy symptoms in 49% to 100% of patients depending on the specific drug
- Taxanes primarily affect small nerve fibers, causing burning, tingling, and numbness in a “stocking-and-glove” pattern in 11% to 87% of patients
- Vinca alkaloids cause dose-dependent nerve damage, with pain in the hands and feet often among the earliest symptoms
- Thalidomide triggers neuropathy in 25% to 75% of patients
- Proteasome inhibitors can cause chronic sensory neuropathy that persists for months or even years after treatment ends
- Epothilones cause mild to moderate sensory neuropathy concentrated in the feet and hands
Beyond chemotherapy, certain antibiotics, HIV medications, and seizure drugs can also cause burning feet. If you notice new foot symptoms after starting any medication, it’s worth flagging for your prescriber, since catching drug-induced neuropathy early and adjusting the dose can sometimes prevent permanent damage.
Tarsal Tunnel Syndrome
Sometimes the cause is mechanical rather than chemical. Tarsal tunnel syndrome occurs when the tibial nerve gets compressed as it passes through a narrow space behind your inner ankle bone. It’s similar to carpal tunnel syndrome in the wrist. The compression can produce burning, tingling, or shooting pain along the bottom of your foot.
Unlike systemic neuropathy, tarsal tunnel syndrome usually affects only one foot and may worsen with prolonged standing, walking, or wearing tight shoes. A clinician can check for it by tapping the nerve behind your ankle (a positive test reproduces the tingling in your sole) or by holding your foot in specific positions that stretch or compress the tunnel. Imaging with MRI can identify the cause of compression, whether it’s a cyst, swollen tendon, or bony spur.
Erythromelalgia
This uncommon condition causes episodes of intense burning, redness, and warmth in the feet, sometimes the hands. The hallmark feature is that episodes are triggered by warm temperatures and relieved by cooling. Exercise, tight shoes, wearing socks, alcohol, and spicy foods can also set off flares.
Primary erythromelalgia is caused by a genetic mutation that makes sodium channels in pain-sensing nerves overly excitable, essentially turning up the volume on pain signals. Secondary erythromelalgia can accompany blood disorders that increase platelet counts. If your feet turn visibly red and feel hot during episodes, and cold water provides immediate relief, erythromelalgia is worth investigating.
Hypothyroidism
An underactive thyroid can contribute to peripheral neuropathy, though it’s less commonly recognized than diabetic or alcoholic causes. Low thyroid hormone levels lead to fluid retention and tissue swelling, which can compress nerves. Thyroid-related neuropathy tends to develop slowly and may be accompanied by other hypothyroid symptoms like fatigue, weight gain, and cold intolerance. A simple thyroid function blood test can confirm or rule this out.
How Burning Feet Are Diagnosed
Because the list of possible causes is long, diagnosis usually starts with blood work. A standard initial workup includes a complete blood count, basic metabolic panel, and blood sugar testing. Depending on your history and risk factors, your doctor may also check B vitamin levels, thyroid function, and kidney markers.
If neuropathy is suspected, nerve conduction studies can assess the larger nerve fibers. But these tests often come back normal in small fiber neuropathy, which is why a skin punch biopsy, where a tiny sample of skin is taken from your lower leg and examined under a microscope for nerve fiber density, is sometimes needed. The procedure is quick, requires only local anesthetic, and provides a direct count of the nerve endings in your skin.
Treatment Options
Treatment depends entirely on the underlying cause. When burning feet result from diabetes, tighter blood sugar control is the foundation. When a vitamin deficiency is responsible, correcting the deficiency can bring meaningful relief. When a medication is the trigger, adjusting or switching it may resolve symptoms.
For the burning sensation itself, treatment focuses on calming overactive nerve signals. Medications that quiet nerve pain are typically tried in a stepwise fashion: if one class of drug doesn’t help or causes bothersome side effects, a different class is tried rather than another drug in the same category. Current guidelines from the American Academy of Neurology emphasize that opioids should not be used for diabetic nerve pain.
Topical treatments offer another option. Prescription-strength capsaicin patches, which contain the compound that makes chili peppers hot, work by overwhelming and then desensitizing the pain-sensing nerve fibers in the skin. In clinical trials, roughly 4 in 10 patients with neuropathic pain achieved at least 30% pain reduction within 12 weeks of a single application. That’s a modest benefit, but for some people it’s enough to take the edge off, and the patches avoid the systemic side effects of oral medications.
Simple measures also help. Wearing breathable, well-fitting shoes reduces mechanical irritation. Soaking feet in cool (not ice-cold) water can temporarily calm burning. Elevating your feet at night and avoiding long periods of standing may reduce symptom flares. For tarsal tunnel syndrome, orthotics or, in stubborn cases, surgery to release the compressed nerve can resolve the problem entirely.