Blog · Boston Limb
Burning Feet at Night: Could It Be Diabetic Neuropathy?
Many people with diabetes describe the same thing: feet that feel fine during the day and then burn, tingle or sting once they lie down. The bedsheet feels heavy. Sleep comes late. By morning it has faded, and it is easy to decide it was nothing.
It is rarely nothing. Night-time burning in the feet is one of the most common ways diabetic peripheral neuropathy first announces itself, and it is worth understanding what is behind it, what else can cause it, and when it has earned a proper assessment.
Why night makes it worse
There is no single explanation, but three things usually combine. During the day, walking and the pressure of shoes produce a constant stream of ordinary sensation that masks the faulty signals from damaged nerves; at rest, those signals are all that is left. Feet are also warmer under a blanket, and warmth tends to amplify burning-type discomfort. Finally, there is simply less to think about at night, so a sensation that was background noise at 3 PM becomes the only thing in the room at 11 PM.
What is usually behind it
Years of raised blood sugar injure the long nerves that run from the spine to the toes, together with the tiny blood vessels that feed them. The longest nerves suffer first, which is why symptoms begin in the toes and soles and work upwards. The damaged fibres misfire, producing burning, pins and needles, electric jolts and, as the condition progresses, numbness.
The same symptoms can come from problems that have nothing to do with diabetes, and several of them are treatable in their own right:
- Vitamin B12 deficiency, more common in people taking metformin for long periods
- Thyroid disorders
- Kidney disease
- Regular alcohol use
- Certain medicines
- Nerve compression in the lower spine
A good assessment does not assume diabetes is the whole answer. It checks for these causes as well, because a plan built on the wrong cause does not work.
The part that matters more than the pain
Burning is uncomfortable, but it is not the dangerous part of neuropathy. The dangerous part is the change nobody feels: the gradual loss of protective sensation. When the foot stops reporting pressure and small injuries, a stone in a shoe, a tight strap or a cut from a nail can go unnoticed for days. Pressure keeps landing on the same spot, the skin breaks down, and an ulcer forms. This is why burning feet and foot ulcers are two chapters of the same story, and why both the nerves and the skin of the foot are examined together.
What a proper assessment involves
- A history of the symptoms, the diabetes and the medicines being taken
- Examination of the feet: skin, pressure points, pulses, temperature and colour
- Sensation and protective-sensation testing
- Nerve conduction testing with DPNCheck, a US FDA-cleared point-of-care device that measures the sural nerve at the ankle in a few minutes, where it adds information
- Blood tests for sugar control, B12, thyroid and kidney function where indicated
- A written plan that covers the cause, the symptoms and the protection of the feet
Bring recent HbA1c and blood sugar reports, any kidney, B12 or thyroid reports, previous nerve or wound reports, a list of current medicines with doses, and the shoes worn most.
Sensible steps in the meantime
- Look at both feet every day, including between the toes and the soles, using a mirror if needed
- Never use a hot-water bottle or heating pad on numb feet; a burn can go unfelt
- Wear shoes that fit, with socks, and check inside them before putting them on
- Do not treat corns, calluses or ingrown nails at home with blades or chemical removers
- Keep a note of when the burning happens and what seems to make it better or worse; it helps the consultation
When to book
Burning, tingling or numbness that has lasted more than a few weeks, that disturbs sleep, or that comes with any change in the skin of the feet is reason enough. So is a previous foot wound, or diabetes that has been hard to control. An assessment takes one visit, and a written plan comes with it.
Book a Foot and Nerve Evaluation
One visit assesses the wound, the nerves, the circulation and the diabetes behind them, with FDA-cleared DPNCheck nerve testing on site. Gachibowli, Hyderabad. Mon to Sat, 10:00 AM to 8:00 PM.
Related reading
Why Diabetic Foot Ulcers Sometimes Fail to Heal
The common factors that slow healing, the warning signs of infection, and why a careful assessment matters.
What Is DPNCheck? Understanding a Test for Diabetic Nerve Health
What the test measures, what to expect, and how the result fits into a wider evaluation.
Written by the Boston Limb care team. The information in this article is general and does not replace an individual consultation or teleconsultation. Assessment and treatment depend on clinical evaluation, and outcomes vary.