Quick Answer
Many diabetes-related foot sores can be prevented, but good blood sugar control alone is not enough. Daily foot checks, properly fitting footwear, treatment of calluses and deformities, regular professional foot examinations, smoking cessation and early attention to blisters or cuts all matter. Any open sore in a person with diabetes needs prompt medical assessment because reduced sensation, pressure, poor circulation and infection can delay healing. Do not treat it only at home or walk on it normally.
Answer by Dr. Albana Greca, MD, MMedSc
Hi Al,
A diabetes-related foot sore is usually called a diabetic foot ulcer. It is an open wound below the ankle in a person with diabetes. Most ulcers result from several factors acting together rather than from high glucose alone.
Why Do Diabetic Foot Sores Develop?
- Loss of protective sensation: Peripheral neuropathy can make a blister, cut, burn or pressure point difficult to feel.
- Repeated pressure or friction: Tight shoes, foot deformities, calluses and walking on an injured area can break down the skin.
- Poor circulation: Peripheral artery disease can reduce oxygen delivery and slow healing.
- Infection: Once the skin is open, bacteria may enter and spread into deeper tissue or bone.
- Other risk factors: Previous ulcer or amputation, kidney failure, smoking, poor vision and difficulty caring for the feet increase risk.
Our guide to diabetic peripheral neuropathy and foot problems explains why an injury may be painless.
Are Foot Ulcers Preventable?
Many are preventable, although no method removes all risk. Blood glucose management helps protect nerves and blood vessels over time, but prevention also requires foot-specific care.
- Inspect the tops, soles, heels and spaces between the toes every day.
- Wear clean socks and well-fitting shoes; do not walk barefoot, even indoors.
- Check inside shoes for stones, rough seams or foreign objects.
- Wash with lukewarm water and dry carefully, especially between the toes.
- Moisturize dry skin, but do not put cream between the toes.
- Do not cut corns or calluses or use chemical corn removers yourself.
- Have at least an annual professional foot examination, and more often when risk is higher.
See the practical routine in diabetic foot-care tips.
If a sore is already present: Contact a doctor, podiatrist or diabetic-foot clinic promptly. An open ulcer, unexplained redness, warmth or swelling should not wait for a routine appointment.
What Should You Do Until It Is Examined?
- Keep pressure off the affected area as much as possible.
- Cover it with a clean, dry, non-stick dressing.
- Do not soak the foot or apply peroxide, alcohol, iodine, herbal pastes or household remedies.
- Do not remove dead skin, callus or tissue yourself.
- Do not use leftover antibiotics.
- Continue prescribed diabetes treatment and monitor glucose as directed.
Do not assume that a small or painless wound is harmless. Neuropathy can reduce pain even when the ulcer is deep or infected.
How Is a Diabetic Foot Sore Treated?
Treatment depends on the ulcer’s location, depth, circulation and signs of infection. Standard care usually includes:
- Pressure relief, or offloading: A cast, removable boot, specialized shoe or another device reduces pressure so the wound can heal.
- Wound assessment and dressings: The wound is measured, cleaned and covered with a dressing selected for its condition and drainage.
- Debridement: A trained clinician may remove callus and dead or infected tissue when appropriate.
- Circulation assessment: Weak pulses or suspected artery disease may require vascular testing and sometimes restoration of blood flow.
- Infection treatment: Antibiotics are used when clinical infection is present; an uninfected ulcer should not receive antibiotics simply to prevent infection.
- Diabetes and health management: Glucose, nutrition, kidney function, smoking, blood pressure and cholesterol may all affect healing.
Read more in our diabetic foot-ulcer treatment guide.
Pressure relief is essential: Repeatedly walking on a plantar ulcer can prevent healing even when dressings and glucose control are good.
When Is It an Emergency?
Seek urgent same-day care for spreading redness, increasing warmth or swelling, pus, bad odor, black or blue tissue, a deep wound, exposed bone, fever or chills. Emergency care is needed for rapidly spreading infection, confusion, severe weakness, fast breathing or other signs of sepsis.
A warm, red and swollen foot without an obvious ulcer may also represent active Charcot foot and requires urgent assessment and avoidance of weight-bearing.
My Advice
If you currently have a foot sore, arrange prompt professional assessment rather than trying vitamins, antibiotics or home debridement. Ask the clinician to evaluate sensation, circulation, infection, depth and pressure on the wound.
For prevention, combine glucose management with daily inspection, protective footwear and regular foot examinations. Anyone with numbness, poor circulation, kidney failure or a previous ulcer needs more frequent specialist follow-up.
Hope this helps.
Dr. Albana Greca
Related Questions
Related Resources
References
Educational only — not personal medical advice. Any open foot wound in a person with diabetes requires prompt professional assessment. Signs of infection, tissue death or systemic illness require urgent care.