Your Feet Are a “Blood Sugar Meter”? Here’s What’s Actually True
The headline is misleading. Your feet cannot reliably tell you whether your blood sugar is high. However, diabetes can cause nerve and blood-vessel problems that often affect the feet, particularly after diabetes has been present for some time. (CDC)
12 foot-related signs worth paying attention to
- Tingling or “pins and needles”
- Burning sensations
- Numbness or reduced sensation
- Foot pain, especially at night
- Unusual sensitivity to touch
- Weakness in the feet or legs
- Cuts or blisters that don’t heal
- Repeated foot infections
- Dry, cracked skin
- Changes in foot color or temperature
- Thickened or yellow toenails
- Loss of hair on the toes, feet, or lower legs (CDC)
These findings do not prove you have diabetes. They can have many other causes. In fact, many people with type 2 diabetes have few or no symptoms, so blood testing is much more reliable than looking at your feet. (NIDDK)
Other classic diabetes symptoms
High blood glucose can also cause increased thirst, frequent urination, increased hunger, fatigue, blurred vision, unexplained weight loss, slow-healing sores, and recurrent infections. (NIDDK)
🚨 Don’t ignore a foot wound
If you have diabetes—or suspect you might—and develop a foot ulcer, infected wound, significant color/temperature change, or loss of sensation, get medical attention promptly. Diabetes-related nerve damage can make injuries difficult to notice and can interfere with healing. (CDC)
Bottom line: Your feet can sometimes reveal complications associated with diabetes, but they aren’t a “blood sugar meter.” If you’re concerned about diabetes, a blood glucose or A1C test is the appropriate way to check.
