What Is a Diabetic Foot Ulcer?

A diabetic foot ulcer is an open sore that develops on the foot, often from a blister, cut, callus, or repeated pressure. Ulcers commonly occur on the bottom of the foot, ball of the foot, heels, and toes.

Diabetic neuropathy can reduce protective sensation, meaning an ulcer may develop without causing noticeable pain. Continued walking can then make the diabetic wound larger or deeper.

Why Do Diabetic Foot Ulcers Heal More Slowly?

Healing requires healthy circulation, oxygen delivery, immune function, pressure relief, proper wound care, and blood sugar control. Diabetes can interfere with several of these processes, making a diabetic wound not heal as quickly as expected.

8 Common Reasons Your Diabetic Foot Ulcer Isn’t Healing

Several factors may contribute to delayed healing, and more than one may be present.

1. Poor Blood Sugar Control

High blood glucose can damage blood vessels, interfere with immune function, increase inflammation, and reduce the delivery of oxygen and nutrients needed for healing. Managing daily glucose levels and A1C is an important part of diabetic wound care.

2. Poor Circulation

Peripheral artery disease (PAD) can reduce blood flow to the feet. Without sufficient oxygen and nutrients, damaged tissue may struggle to heal. Cold feet, pale skin, weak pulses, and slow-healing wounds can be signs of circulation problems. A vascular evaluation may be recommended when appropriate.

3. Diabetic Neuropathy

Neuropathy can cause loss of protective sensation. You may continue walking on an ulcer without realizing it, repeatedly exposing the wound to pressure and delaying treatment.

4. Continued Pressure on the Wound

Every step puts pressure on your feet. Walking repeatedly over an ulcer can reopen healing tissue. Offloading may involve a walking boot, surgical shoe, custom orthotics, crutches, or activity modification.

5. Infection

Bacteria can significantly delay healing and may spread quickly in people with diabetes. Warning signs include redness, swelling, warmth, drainage, foul odor, fever, chills, or increasing pain when sensation remains. Suspected infection requires prompt medical evaluation.

6. Dead Tissue in the Wound

Necrotic tissue and callus buildup can prevent healthy tissue from developing. Debridement, performed by a healthcare professional, removes unhealthy tissue and can create a better environment for healing.

7. Poor Footwear

Tight shoes, friction, pressure points, and inadequate support can repeatedly irritate an ulcer. Proper diabetic shoes and custom orthotics may reduce pressure and protect vulnerable areas.

8. Delaying Professional Treatment

Waiting too long or relying solely on home remedies may allow an ulcer to worsen. Professional evaluation can identify problems such as infection, poor circulation, neuropathy, or pressure and address them before complications develop.

Signs Your Diabetic Foot Ulcer May Be Getting Worse 

Seek prompt medical evaluation if you notice increasing redness, swelling, drainage, foul odor, black tissue, increased warmth, an enlarging wound, fever, chills, or visible bone or tendon. Diabetic neuropathy can mask pain, so a serious wound may not hurt significantly.

How Are Non-Healing Diabetic Foot Ulcers Treated?

Treatment depends on the ulcer’s severity and your overall health.

• • Wound cleaning: Regular cleansing and appropriate dressings help protect the wound and reduce contamination.
  • Debridement: Removing dead or damaged tissue can reduce barriers to healing and support healthy tissue growth.
  • Offloading pressure: Walking boots, diabetic shoes, custom orthotics, padding, and activity modification can reduce pressure on the ulcer.
  • Infection management: Antibiotics may be prescribed when an infection is present, along with monitoring and follow-up care.
  • Improving healing: Blood sugar management, circulation assessment, proper nutrition, smoking cessation, and regular wound monitoring may all support recovery.

Can a Diabetic Foot Ulcer Heal Without Surgery?

Yes. Many ulcers heal with conservative treatment when addressed early. Surgery may be considered for severe infection, bone involvement, significant deformity, or ulcers that fail to respond to conservative care. Treatment should always be individualized.

What Happens If a Diabetic Foot Ulcer Won’t Heal?

A chronic ulcer can lead to complications such as cellulitis, osteomyelitis (bone infection), gangrene, hospitalization, or amputation. Early treatment is important because addressing the problem before it progresses can help reduce these risks.

Tips to Prevent Diabetic Foot Ulcers

• Inspect your feet every day. 
• Keep blood sugar controlled as recommended. 
• Never walk barefoot. 
• Keep feet clean and dry. 
• Wear properly fitted footwear or diabetic shoes. 
• Check inside your shoes before wearing them. 
• Have calluses treated professionally. 
• Address blisters and minor wounds promptly. 
• Avoid smoking. 
• Schedule routine podiatry visits. 

Frequently Asked Questions

Why is my diabetic foot ulcer taking so long to heal?

High blood sugar, poor circulation, neuropathy, infection, repeated pressure, dead tissue, and inadequate wound care can all delay healing. A podiatrist can determine which factors are affecting your ulcer.

Can I walk on a diabetic foot ulcer?

You should avoid putting unnecessary pressure on a diabetic foot ulcer unless your healthcare provider has specifically instructed you otherwise. Your provider may recommend offloading with a boot, specialized shoe, orthotic, padding, or crutches.

How long should a diabetic foot ulcer take to heal?

Healing time varies based on the wound’s depth, size, circulation, blood sugar control, infection, and pressure. A wound that isn’t improving should be professionally evaluated.

What does an infected diabetic foot ulcer look like?

Redness, swelling, warmth, drainage, foul odor, increasing pain, fever, or chills can indicate infection. Because neuropathy can reduce sensation, seek evaluation even when pain is minimal.

Will antibiotics heal a diabetic foot ulcer?

Antibiotics can treat a bacterial infection when one is present, but they don’t address other causes such as pressure, poor circulation, or dead tissue.

Can a diabetic foot ulcer heal at home?

Some wound-care instructions can be followed at home, but persistent ulcers require professional evaluation. Avoid cutting tissue or using unapproved home remedies.

Does high blood sugar slow wound healing?

Yes. High blood sugar can interfere with circulation, immune function, and tissue repair, making wounds more difficult to heal.

When should I see a podiatrist?

See a podiatrist for any diabetic foot wound that isn’t healing normally. Prompt evaluation is especially important for redness, swelling, drainage, discoloration, fever, or an enlarging wound.

Schedule Diabetic Wound Care in Dallas

If your diabetic foot ulcer isn’t healing, don’t wait for it to worsen. Dr. Matthew Babich and the team at Texas Foot & Ankle Center provide personalized diabetic wound care to help protect your feet and reduce the risk of serious complications. Call (214) 660-0777 or request an appointment online today.