Many people with diabetes describe their symptoms as “burning feet,” “hot soles,” or “a constant warm sensation in the feet, especially at night.” Although these symptoms are often mistaken for poor circulation, they may actually be an early sign of Diabetic Peripheral Neuropathy (DPN), one of the most common long-term complications of diabetes.
Research shows that Small Fiber Neuropathy (SFN) is the leading cause of burning feet, and diabetes is the most common identifiable underlying condition. Persistently elevated blood glucose damages peripheral nerves over time, leading to burning pain, numbness, tingling, and reduced sensation. Without proper treatment, severe nerve damage may increase the risk of foot ulcers, infections, and even lower-limb amputation.
In addition to optimal blood glucose control, growing evidence suggests that Traditional Chinese Medicine (TCM), including herbal medicine and acupuncture, may serve as an adjunctive therapy to help relieve neuropathic symptoms and improve patients’ quality of life.
Why Does Diabetes Cause Burning Feet?
The most common cause is Small Fiber Neuropathy (SFN).
Peripheral nerves consist of both large and small nerve fibers. Small nerve fibers are responsible for transmitting pain, temperature, and autonomic nerve signals. Chronic hyperglycemia increases oxidative stress, damages tiny blood vessels supplying the nerves, and gradually impairs nerve function.
As a result, patients may experience abnormal sensations such as burning, tingling, or stabbing pain.
Typical characteristics include:
- Burning or hot sensations in the soles of the feet
- Symptoms that worsen at night
- Tingling, numbness, or “pins and needles”
- Symptoms beginning in the toes and gradually spreading upward
- Usually affecting both feet symmetrically
- Normal muscle strength during the early stages
Without timely intervention, nerve damage may progress, resulting in loss of protective sensation and a significantly higher risk of diabetic foot complications.
Is Diabetes the Only Cause of Burning Feet?
Not necessarily. Although diabetes is the leading cause, physicians must rule out other possible conditions.
Vitamin B12 Deficiency
Vitamin B12 deficiency may occur in individuals with long-term vegetarian diets, gastrointestinal disorders, previous stomach surgery, or chronic use of certain medications that reduce vitamin absorption. Deficiency can lead to peripheral neuropathy with symptoms similar to diabetic nerve damage.
Alcohol-Related Neuropathy
Chronic alcohol consumption can directly damage peripheral nerves and may also contribute to vitamin B1 (thiamine) deficiency, both of which may cause burning feet.
Medication-Induced Neuropathy
Certain medications are known to cause peripheral nerve injury, including:
- Paclitaxel
- Vincristine
- Cisplatin
- Amiodarone
- Excessive vitamin B6 supplementation
- Some antiviral medications
Thyroid Disorders
Hypothyroidism is another common metabolic condition associated with peripheral neuropathy.
Autoimmune Diseases
Autoimmune disorders such as Sjögren’s syndrome may attack peripheral nerves and produce symptoms similar to diabetic neuropathy.
Tarsal Tunnel Syndrome
Compression of the posterior tibial nerve within the tarsal tunnel can also produce burning pain in the feet. Unlike diabetic neuropathy, this condition often requires different treatment and should be distinguished through proper evaluation.