Quick answer: Cold feet with diabetes can just mean a cool room, but they can also signal nerve damage or narrowed leg arteries, so mention them to your doctor. Warm them gently with loose, dry socks, a blanket, and moving your toes and ankles. NIDDK says not to put a heating pad or hot water bottle on your feet.
Are cold feet a sign of diabetes?
Not on its own. Plenty of cold feet come from a cold floor, damp socks or sitting still. But diabetes raises the odds of two problems that can make feet feel cold.
- Nerve damage (peripheral neuropathy). NIDDK, the National Institute of Diabetes and Digestive and Kidney Diseases, says up to one-half of people with diabetes have it. It can make feet burn, tingle or go numb, and cause trouble sensing temperature.
- Narrowed leg arteries (peripheral artery disease, or PAD). The American Diabetes Association's guide to PAD says about one-third of people with diabetes over age 50 have it, and many don't know. Its warning signs include "numbness, tingling, or coldness in your feet or the lower part of your legs."
NIDDK's foot care guidance adds that diabetes can lower the amount of blood flow in your feet.
What causes cold feet in people with diabetes?
Several can happen at once.
| Possible cause | What you might notice | How it's usually checked |
|---|---|---|
| A cool room, damp socks or sitting still | Both feet cold; they warm up once you move or change into dry socks | Nothing special. Mention it if it keeps happening. |
| Nerve damage (peripheral neuropathy) | Burning, tingling or numbness; trouble telling warm from cold; often worse at night (NIDDK) | A foot exam with a tuning fork and a thin nylon strand called a monofilament |
| Peripheral artery disease (PAD) | One foot colder than the other; pale or bluish skin; sores that are slow to get better; leg pain or cramps when you walk that ease with rest | A pulse check in your feet and an ankle-brachial index (ABI) test, which compares blood pressure at your ankle and your arm |
| Underactive thyroid (hypothyroidism) | Trouble tolerating cold, tiredness, dry skin. NIDDK says it is more likely with type 1 or type 2 diabetes and after age 60. | Blood tests |
| Anemia | Cold hands and feet, tiredness, dizziness, pale skin (NHLBI) | A blood test for hemoglobin |
| Raynaud's phenomenon | Toes turn white, then blue, then red as they warm up again; set off by cold or stress (NIAMS) | An exam, often with a close look at the skin at the base of your fingernails (nailfold capillaroscopy) |
| Smoking or vaping | The CDC says smoking reduces blood flow to the feet. NIAMS says smoking and vaping can set off Raynaud's attacks. | Ask your doctor for help quitting. |
| Some medicines | MedlinePlus says certain medicines can cause poor blood flow, and names beta-blockers as a frostbite risk. | Ask your doctor or pharmacist. Don't stop a medicine on your own. |
Why do my feet feel cold when they're warm to the touch?
Nerve damage changes how your feet report temperature. NIDDK describes "problems sensing pain or temperature," and MedlinePlus notes that people with diabetic nerve damage may not notice when their feet touch something too hot or too cold. So how cold your feet feel may not match how warm they really are.
Try this at home: ask someone to feel both feet with the back of their hand. If one foot is clearly colder, paler or more bluish, that matches the PAD signs listed by the National Heart, Lung, and Blood Institute (NHLBI). Either way, tell your doctor, who can sort out nerves from blood supply with a quick foot exam.
How do diabetics keep their feet warm safely?
- Wear warm, dry socks with a loose top. MedlinePlus says, "In cold weather, wear warm socks, and do not stay out in the cold for very long." NIDDK adds, "Do not wear tight socks or elastic stockings."
- Change damp socks. The ADA warns that extra moisture can lead to skin breakdown.
- Choose roomy winter boots. NIDDK suggests lined, waterproof boots in winter "to keep your feet warm and dry." MedlinePlus says tight clothing or boots can cause poor blood flow, so leave room for your socks.
- Keep your feet moving. NIDDK suggests putting your feet up when you sit, wiggling your toes for a few minutes throughout the day, and moving your ankles up and down and in and out.
- Warm the rest of you. The CDC suggests a blanket, some activity at home, or a cup of hot tea.
- Keep foot washes warm, not hot. NIDDK says 90° to 95° F is safe. Test the water with a thermometer or your elbow, not your feet, and don't soak your feet.
- Stay back from heaters and open fires, as NIDDK advises.
Why shouldn't you use a heating pad on diabetic feet?
Because you may not feel a burn happening. NIDDK puts it plainly: "Do not put a hot water bottle or heating pad on your feet." In its cold weather tips, the CDC says to be careful with electric blankets, heating pads and foot warmers, because "you may not recognize the temperature is too high and burn your skin."
This is a real risk. A study published in 2021 in the International Wound Journal looked at 16 people with diabetic nerve damage admitted to one hospital's plastic surgery ward in Taiwan with severe burns, nearly all on the feet, from heat they used to warm up. Their average age was 65. The heat came from footbaths for 6 people, electric blankets for 3, heaters for 3, heating pads for 2 and infrared lamps for 2. The average hospital stay was 28 days.
What are the best warm socks for diabetics?
Start with the ADA's sock checklist: white or light-colored so bleeding or drainage is easy to spot, a good fit that isn't too tight, synthetic fabric or wool to move moisture away from the skin, no bothersome seams, and some padding if you need cushion. For cold feet, add warmth, but never at the price of a tight band.
| Sock type | Warmth (rough guide) | Top band | Good for | Watch for |
|---|---|---|---|---|
| Non-binding diabetic crew or knee high, cotton-rich | Light to medium | Loose | Everyday wear indoors, cool evenings, sleeping | Cotton holds moisture, so change a damp pair |
| Merino wool or wool-blend diabetic socks | Medium to high | Loose on diabetic styles; regular wool socks vary | Cold days outside, cold floors | Thick socks can make shoes tight; some find wool itchy |
| Synthetic thermal socks (brushed acrylic or polyester) | Medium to high | Varies, so look for "non-binding" | Cold houses, winter errands | Sweaty feet if they run too warm |
| Two pairs, layered | Higher | Two bands, and both must be loose | Short trips out in real cold | Boots that end up too tight |
| Heated or battery socks | Highest | Varies | Only after you ask your doctor | Heat you may not feel if you have nerve damage |
| Compression socks | Not a warming sock | Firm on purpose | Only if your doctor prescribes them | A different tool, not a fix for cold feet |
Shopping for non-binding socks? Check that the top stays up without pressing a deep ring into your leg.
A note on our own socks, since this is our site. Mi Socks are non-binding crew and knee high socks with a smooth flat toe seam, a terry-cushioned sole and a breathable cotton-rich blend. They suit everyday wear and cool nights indoors. For long stretches outside in winter, a wool or thermal sock with a loose top is the warmer choice, and we'd rather tell you that than oversell ours. To always have a dry pair on hand, the Mi Socks 6-pack ($6 a pair) ships free in the US. They are comfort socks, not a medical treatment.
Can you wear socks to bed if your feet are cold?
Yes. NIDDK says, "Wear socks in bed if your feet get cold," and MedlinePlus says to choose clean, dry socks for bed. A simple bedtime routine:
- Look at your feet, soles and between the toes too. The CDC says to check for cuts, redness, swelling, sores and blisters. Tell your doctor about any you find.
- Wash in warm, not hot, water, then dry well between the toes.
- Put on a fresh, loose pair, not the pair you wore all day.
- Add a blanket over your feet instead of a heating pad or hot water bottle.
- Keep slippers by the bed. The CDC says to wear shoes and socks or slippers, even inside.
More in our guide to wearing diabetic socks to bed.
When should you see a doctor about cold feet?
Mention cold feet at your next visit. The CDC says to get your feet checked at every visit with your primary care provider. The ADA's patient guide on PAD says your provider should check your ankle-brachial index if you are over 50 and have diabetes, or at any age if you have warning signs.
The CDC says not to wait for your next appointment. See your doctor or foot doctor right away for:
- a change in the color and temperature of your feet
- loss of feeling for heat or cold
- tingling, burning or pain in your feet
- pain in your legs, or cramping in your buttocks, thighs or calves, during physical activity
- loss of hair on your toes, feet and lower legs
- a blister, sore or ingrown toenail
NIDDK adds a cut, blister or bruise that does not start to heal after a few days, and skin on your foot that becomes red, warm or painful.
Call 911 or go to the emergency room if a foot or leg turns cold, pale and painful, or goes numb or weak, especially if it happens suddenly. MedlinePlus lists these, along with a weak or missing pulse, as signs of an arterial embolism, a clot blocking an artery, which needs emergency care.
Frequently asked questions
Can high blood sugar cause cold feet?
Over time it can play a part. NIDDK says high blood glucose can damage your nerves and the small blood vessels that nourish them, and that diabetes can lower blood flow in your feet. Either can leave feet feeling cold, so ask your care team to check both.
Why is one foot colder than the other?
The NHLBI lists "one foot may feel colder than the other" as a sign of peripheral artery disease, so tell your doctor. If the colder foot is also pale, painful or numb and it came on suddenly, call 911.
Are heated socks safe for people with diabetes?
Ask your doctor first. The CDC warns that with heating pads and foot warmers, you may not recognize when the temperature is too high. Heated socks put heat right against your skin, so the same caution applies. Our guide to heated socks and diabetes shows how hot they get, what the recalls found and safer ways to warm your feet.
Should I wear two pairs of socks?
For a short trip out in real cold, it can help. The MedlinePlus frostbite page suggests 2 pairs of socks in cold weather and lists diabetes as a frostbite risk. Make sure both tops are loose and your boots still fit. Our guide to diabetic socks for winter covers layering in boots and what to do when socks get wet.
Are wool socks good for diabetics?
Often, yes. The ADA lists wool and synthetic fabrics as good choices for moving moisture away from the skin. Pick a wool sock with a loose top and a smooth toe. If wool itches, try a synthetic thermal sock.
Do compression socks help cold feet?
They are not a way to warm your feet. The ADA suggests asking your provider about compression if you have venous insufficiency, leg or foot swelling, or a history of a blood clot in the leg. Cold feet can be a sign of narrowed leg arteries, so have those checked before you try compression. Mi Socks are not compression socks. Our guide to diabetic socks vs compression socks explains the difference.
Sources
- NIDDK. Diabetes & Foot Problems.
- NIDDK. Peripheral Neuropathy.
- NIDDK. Hypothyroidism (Underactive Thyroid).
- American Diabetes Association. All About Peripheral Arterial Disease (patient handout, 2009).
- American Diabetes Association. 8 Tips to Protect Your Feet with Diabetes.
- CDC. Your Feet and Diabetes.
- CDC. Managing Diabetes in Cold Weather.
- NHLBI. Peripheral Artery Disease: Symptoms and Diagnosis.
- NHLBI. Iron-Deficiency Anemia.
- NIAMS. Raynaud's Phenomenon.
- MedlinePlus. Diabetes: taking care of your feet.
- MedlinePlus. Diabetes and nerve damage.
- MedlinePlus. Frostbite.
- MedlinePlus. Hemoglobin Test.
- MedlinePlus. Arterial embolism.
- Chang WY, et al. Severe burn injury from the common Asian practice of heat application in patients with diabetic neuropathy. International Wound Journal, 2022;19(4):845-852 (online August 2021).