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Diabetes and Foot Problems: Warning Signs You Should Not Ignore

  • Writer: Dr. Virk
    Dr. Virk
  • 3 days ago
  • 5 min read

By Dr. Harman Virk, DO — Board‑Certified Internal Medicine, The Modern Medicine Group (Fresno, CA) 



Medical disclaimer: This article is educational and not medical advice. If symptoms are severe, worsening, or you’re worried—seek urgent care or call 911.


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Quick Take

  • Diabetes damages nerves and blood flow. Together, that means an injury you cannot feel, healing in tissue that gets less blood.

  • Most serious diabetic foot problems start as something small — a blister, callus, cracked heel, or trimmed nail.

  • The single most protective habit is a daily foot check. It takes under a minute.

  • Any open sore, spreading redness, drainage, odor, or new warmth is a same-day problem, not a “watch it for a week” problem.

  • Never treat corns, calluses, or ingrown nails yourself. That is how many ulcers begin.


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Table of Contents


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1) Why Diabetes Affects the Feet

Two problems stack, and the combination is what makes feet the highest-risk area in diabetes care.


Nerve damage reduces sensation, so injuries go unnoticed. A pebble in a shoe, a blister from new sandals, or a burn from hot pavement can go unfelt for days.


Reduced circulation means less blood reaches the skin and tissue of the feet, so wounds heal slowly and infections are harder to fight.


Higher blood sugar also impairs the immune response, which lets minor infections escalate faster than they would otherwise.


Individually, each is manageable. Together, a small injury can become a serious wound in days — which is why prevention and early detection matter so much here.


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2) Neuropathy: When You Cannot Feel the Warning

Diabetic nerve damage usually starts in the toes and moves upward.

Common symptoms:

  • Burning, tingling, or pins-and-needles, often worse at night

  • Numbness, or feet that feel “far away”

  • Sharp or shooting pains

  • Feeling like you are walking on cushions or gravel

  • Reduced ability to sense hot, cold, or pain

  • Weakness or changes in balance


The dangerous part is not the discomfort. It is the loss of the alarm system. Pain is what normally tells you a shoe is rubbing or a stone is under your heel.


Mention new or worsening numbness at your next visit even if it does not hurt. Numbness changes your entire risk profile and should change how your feet get monitored.


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3) The Daily Foot Check

Do it at the same time each day — many people pair it with getting ready for bed.

Look at:

  • The tops and bottoms of both feet

  • Between every toe

  • Heels, especially for cracks

  • Toenails and the skin around them

  • The soles, using a mirror on the floor or a long-handled mirror if bending is hard


Check for cuts, blisters, redness, swelling, warm spots, calluses, cracks, color changes, or anything draining.


Also feel for temperature differences between the two feet. A warm spot on one foot can be an early sign of a problem underneath the skin.


If you cannot see or reach your feet, have someone check for you. Vision problems and limited mobility are among the biggest reasons wounds are found late.


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4) Warning Signs That Need Care Today

Call your doctor the same day for:

  • Any open sore, ulcer, or wound that will not close

  • Redness spreading from a wound

  • Warmth, swelling, or new pain in one foot

  • Drainage, pus, or a bad odor

  • A blister that has broken open

  • A black or darkened area of skin

  • A puncture wound, including stepping on something

  • Any wound with fever or chills

  • Blood sugar running unusually high alongside a foot problem


Seek emergency care for fever with a foot wound, rapidly spreading redness, severe pain, or a foot that is cold, blue, or numb with sudden severe pain.


When in doubt, be seen. Delay is the main driver of bad outcomes here.


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5) What Not to Do at Home

  • Do not perform “bathroom surgery” on corns, calluses, or ingrown toenails

  • Do not use over-the-counter corn or wart removers — the acid can burn insensitive skin

  • Do not use heating pads, hot water bottles, or electric blankets on your feet

  • Do not soak feet for long periods, which softens skin and increases injury risk

  • Do not walk barefoot, indoors or out

  • Do not wear new shoes for long stretches before breaking them in gradually

  • Do not cut toenails at a curve — cut straight across, and have a professional do it if you have neuropathy or poor vision.


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6) What Your Clinic Visit May Include

At The Modern Medicine Group, diabetes foot care may include:

  • A comprehensive foot exam, generally recommended at least annually and more often with neuropathy or prior wounds

  • Sensation testing with a monofilament and tuning fork

  • Checking pulses and circulation, with further testing when indicated

  • Inspection of skin, nails, calluses, and pressure points

  • Review of footwear

  • A1c review and diabetes management adjustments

  • Wound care, cultures, and antibiotics when needed

  • Referral to podiatry or wound care when appropriate

  • Guidance on therapeutic shoes, which some plans cover


For patients still working out whether they have diabetes at all, Modern Medicine’s related article, Early Warning Signs of Diabetes Most People Ignore, is a good starting point.


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7) Frequently Asked Questions

How often should I have my feet examined?

At minimum once a year for everyone with diabetes, and more frequently with neuropathy, poor circulation, foot deformities, or any prior wound. Your doctor sets the interval.

It may be. It can also come from circulation problems, vitamin deficiencies, thyroid disease, medications, or other conditions. It should be evaluated rather than assumed.

Discuss it with your doctor first. If you have neuropathy or circulation problems, professional medical nail care is safer.

No. Painless is not the same as minor — with neuropathy, painless is expected. Small wounds are exactly the ones that should be seen early.

Better glucose control reduces the risk of nerve and vessel damage over time, which is the underlying cause. It is the most effective long-term prevention available.


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Fresno CTA — The Modern Medicine Group

If you have diabetes and it has been more than a year since anyone examined your feet, book that visit — and if there is an open sore, call today.


The Modern Medicine Group provides comprehensive diabetic foot exams, sensation and circulation testing, wound evaluation, and full diabetes management for Fresno patients.


Visit: 7053 N. Cedar Ave., Fresno, CA 93720 

Phone: 559-369-7787


 
 
 

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