Diabetic Foot Wound Not Healing: What to Do

Why do diabetic foot wounds heal so slowly?

Diabetes affects wound healing through several intersecting pathways, each well-characterized in the medical literature 1Ref 1American Diabetes Association Professional Practice Committee (2024).Standards of Care in Diabetes — 2024.Impaired wound healing in diabetes; blood sugar control as a factor in healing; offloading as a core treatment; timely specialist evaluation for diabetic foot ulcers:

Peripheral neuropathy. High blood sugar over time damages the nerves in the feet, reducing or eliminating the ability to feel pain, pressure, or heat. This means a blister, cut, or pressure sore can develop and worsen before a person notices it. Many diabetic foot ulcers begin as a small wound that was not felt.

Peripheral artery disease (PAD). Diabetes accelerates atherosclerosis in the small and large vessels supplying the legs and feet. PAD is a factor in nearly half of diabetic foot ulcers 2Ref 2Deng H, Li B, Shen Q, Zhang C, Kuang L, Chen R, Wang S, Ma Z, Li G (2023).Mechanisms of diabetic foot ulceration: A review.PAD involvement in ~50% of DFUs; macrophage pro-inflammatory state in diabetic wounds; impaired keratinocyte and fibroblast function under hyperglycemia. Poor circulation means the wound receives less oxygen and fewer immune cells needed to fight infection and rebuild tissue.

Impaired immune response. Elevated blood glucose reduces the effectiveness of white blood cells, making both infection more likely and harder to clear. Macrophages in diabetic wounds remain locked in a pro-inflammatory state instead of transitioning to tissue repair 2Ref 2Deng H, Li B, Shen Q, Zhang C, Kuang L, Chen R, Wang S, Ma Z, Li G (2023).Mechanisms of diabetic foot ulceration: A review.PAD involvement in ~50% of DFUs; macrophage pro-inflammatory state in diabetic wounds; impaired keratinocyte and fibroblast function under hyperglycemia.

Disrupted tissue repair. The entire sequence of wound healing — inflammation, proliferation, and remodeling — is disrupted at a cellular level by hyperglycemia, including impaired keratinocyte and fibroblast function 2Ref 2Deng H, Li B, Shen Q, Zhang C, Kuang L, Chen R, Wang S, Ma Z, Li G (2023).Mechanisms of diabetic foot ulceration: A review.PAD involvement in ~50% of DFUs; macrophage pro-inflammatory state in diabetic wounds; impaired keratinocyte and fibroblast function under hyperglycemia.

What does a diabetic foot ulcer look like?

Diabetic foot ulcers typically appear on the sole of the foot under weight-bearing areas, or at points of pressure or friction. Common sites include the ball of the foot, under the big toe, and over bony prominences.

They often begin as a callus, a blister, or a small abrasion that breaks down into an open sore. The surrounding skin may be thickened or reddened. Drainage (fluid or pus) may be present.

Because neuropathy reduces sensation, the ulcer itself may not be painful — even when it is infected or deep. Do not use the absence of pain as reassurance that a wound is not serious.

What should I do at home while waiting to be seen?

Keep the wound clean and protected. Gently clean the wound with mild soap and water or saline. Cover with a non-stick dressing. Change the dressing daily or as directed.

Offload pressure. Remove weight from the wound area. Avoiding walking barefoot is essential; your clinician may recommend a specialized offloading device or therapeutic footwear. Pressure relief is one of the most important components of diabetic foot ulcer treatment 3Ref 3American Diabetes Association Professional Practice Committee (2024).12. Retinopathy, Neuropathy, and Foot Care: Standards of Care in Diabetes — 2024.Offloading as core DFU treatment; glycemic optimization in wound management; interprofessional care team for foot ulcers; therapeutic footwear recommendations for high-risk feet.

Control your blood sugar. The ADA Standards of Care emphasize that optimizing glycemic control is a foundation of diabetic wound management — elevated glucose directly impairs healing at the cellular level 3Ref 3American Diabetes Association Professional Practice Committee (2024).12. Retinopathy, Neuropathy, and Foot Care: Standards of Care in Diabetes — 2024.Offloading as core DFU treatment; glycemic optimization in wound management; interprofessional care team for foot ulcers; therapeutic footwear recommendations for high-risk feet.

Do not probe the wound or remove dead tissue yourself. Debridement (removal of dead or infected tissue) is a clinical procedure and should not be attempted at home.

Inspect your feet daily. Because you may not feel problems developing, visual inspection of both feet every day — including the soles — is essential.

When should I escalate to a specialist?

The ADA Standards of Care for 2024 recommend an interprofessional approach for all patients with diabetes who have foot ulcers or high-risk feet 3Ref 3American Diabetes Association Professional Practice Committee (2024).12. Retinopathy, Neuropathy, and Foot Care: Standards of Care in Diabetes — 2024.Offloading as core DFU treatment; glycemic optimization in wound management; interprofessional care team for foot ulcers; therapeutic footwear recommendations for high-risk feet. Do not manage a non-healing wound on your own for more than a few days.

See your Gale primary-care clinician promptly if: - A wound has not noticeably improved after one to two weeks of basic care - The wound is larger than a centimeter (roughly half an inch) - There is swelling, increasing redness, warmth, or odor - You have poor blood sugar control

Seek a specialist or emergency evaluation for: - Any wound that has not healed after four to six weeks - Signs of deeper infection: pus, red streaks spreading from the wound, fever, chills - A dark, black, or discolored wound (possible gangrene or severe tissue death) - Bone that can be felt at the base of the wound (probe-to-bone test positive — associated with osteomyelitis)

Which specialists treat diabetic foot wounds?

Care often involves a multidisciplinary team: - Wound care specialists manage dressing regimens, debridement, and monitoring. - Podiatrists are foot and ankle specialists who manage ulcers, calluses, and footwear, and perform nail and skin procedures. - Vascular surgeons or interventional radiologists assess and treat poor circulation (PAD) — often a critical underlying factor. - Endocrinologists or primary-care physicians optimize blood sugar control. - Orthopedic surgeons may be involved when bone or joint structures are affected.

A Gale primary-care clinician can coordinate this team and facilitate referrals. For a wound that is new, small, and in someone with well-controlled diabetes, starting with your Gale clinician is appropriate. For a wound showing signs of infection or failing to progress, a prompt wound care or podiatry referral is the right next step.

How important is footwear?

Footwear plays a major role in both healing and prevention. Ill-fitting shoes cause the pressure and friction that create most diabetic foot ulcers. The ADA recommends specialized therapeutic footwear for people with diabetes at high risk for ulceration — including those with sensory loss, deformities, or poor circulation 3Ref 3American Diabetes Association Professional Practice Committee (2024).12. Retinopathy, Neuropathy, and Foot Care: Standards of Care in Diabetes — 2024.Offloading as core DFU treatment; glycemic optimization in wound management; interprofessional care team for foot ulcers; therapeutic footwear recommendations for high-risk feet. Medicare and many insurance plans cover therapeutic footwear for people with diabetes who have peripheral neuropathy. Discuss this with your clinician.