Diabetic Heel Ulcer Down to the Bone: Can the Heel Still Be Saved With a Flap?
Written by Dr. Ashutosh A Shah, M.B.B.S., M.S., M.Ch., D.N.B., Board Certified Plastic and Reconstructive Surgeon.
Medically reviewed by Dr. Ashutosh A Shah
A diabetic heel ulcer that reaches bone can often be saved when blood flow is adequate, infected bone is removed and the heel can be offloaded for weeks. Dr. Ashutosh Shah may then close it with a local or free flap. Saving the heel is unwise when circulation cannot be restored or offloading is impossible.
Can a deep diabetic heel ulcer be saved? Often, yes, but only if the right problems are fixed in the right order. Families are frequently told that a heel ulcer reaching the bone means amputation. That is not always true. This guide explains heel ulcer flap surgery in plain language: why the heel is so hard to heal, what must be ready before any flap, which flaps are used, how long recovery takes, and when saving the heel is the wrong choice.
Why are heel ulcers harder to heal than toe ulcers?
The heel carries body weight with every step, has a thin layer of tissue over the bone and often has poor blood supply in people with diabetes. The IWGDF 2023 offloading guideline notes that rearfoot ulcers are considered more of a challenge to offload and heal than forefoot ulcers.
- Constant pressure: the heel takes weight when standing and when lying on the back, so a heel pressure ulcer diabetic patients develop in bed is common.
- Little padding: the heel bone (calcaneus) sits close under the skin, so an ulcer reaches bone quickly.
- Bone infection: calcaneal osteomyelitis, diabetic bone infection of the heel bone, is common once bone is exposed.
- Late detection: numb feet mean many heel ulcers are found only when they are large and deep.
- Few local tissues: there is little spare skin nearby to close a large defect.
What must be fixed before any flap: circulation, infection or pressure?
All three, and in that order. The IWGDF 2023 practical guidelines set out the sequence: check and restore blood flow, control infection, then offload, alongside sugar control and treatment of other illnesses. A flap placed before these are ready usually fails.
Heel salvage readiness checklist
| Check | What must be true before a flap | How it is checked |
|---|---|---|
| Perfusion | Enough blood reaching the heel, or restored by a vascular procedure | Pulses, ankle and toe pressures, TcPO2, Doppler or angiography. IWGDF advises urgent vascular review if ankle pressure is under 50 mmHg, ABI under 0.4, toe pressure under 30 mmHg or TcPO2 under 25 mmHg |
| Infection and bone status | Infection controlled; infected or dead bone removed | X-ray or MRI, bone sample sent for culture, surgical debridement |
| Offloading ability | The patient can keep weight off the heel for several weeks | Assessment of strength, balance, home setup and willingness to use a cast, boot or wheelchair |
| Sugar | Blood sugar under steady control | Regular sugar readings and HbA1c, with insulin if needed |
| Kidney function | Kidney function known and stable; dialysis timing planned | Creatinine and eGFR; nephrology input if reduced |
| Caregiver | Someone available to help with dressings, turning and travel | Discussion with the family before surgery |
IWGDF also advises re-checking blood flow if an ulcer shows no healing in 4 to 6 weeks despite good care. Our Limb salvage planning guide explains how this work-up is organised.
What surgery is done for a heel ulcer that reaches the bone?
First, debridement: removing dead tissue and infected heel bone, sometimes a partial calcanectomy, which removes the infected part of the heel bone. Once the wound is clean and blood flow is adequate, the defect is closed with a flap. Deep heel ulcer treatment is therefore usually done in two or more stages.
Which flaps are used to rebuild the heel?
In heel ulcer flap surgery, the choice depends on the size and position of the defect, the state of nearby tissue and the blood supply. A flap brings living tissue with its own blood vessels, which a skin graft cannot do over bare bone.
| Flap option | Best suited to | Points to know |
|---|---|---|
| Local rotation or advancement flap | Small defects at the edge of the heel | Uses nearby skin; limited reach |
| Medial plantar artery flap | Small to moderate defects on the weight-bearing heel | Tough sole skin from the arch, moved on its own vessel; needs good foot circulation |
| Reverse sural flap | Back of the heel and Achilles area | Tissue from the back of the calf; no microsurgery needed |
| Free flap | Large defects or when no local tissue is usable | Tissue from elsewhere, reconnected under a microscope; needs a healthy recipient artery |
| Partial calcanectomy with closure | Infected heel bone with a defect that can be closed after bone removal | Removing bone can let the skin close; heel shape and push-off change |
A review in HMP Podiatry describes the medial plantar artery flap as a useful option for diabetic heel defects, but only within a wider plan of debridement, infection control and confirmed circulation. For how flaps fit into limb salvage heel care, see Limb salvage surgery.
How long before walking and what footwear follows?
Expect several weeks off the foot, then a gradual return to walking in protective footwear. A typical plan keeps all weight off the heel for about 4 to 6 weeks while the flap heals, though the exact time depends on the flap, the bone surgery and healing.
- First days: flap checks for colour and warmth; the leg kept raised and the heel never resting on the bed.
- Weeks 1 to 6: no weight on the heel; walker, wheelchair or offloading boot as advised.
- After healing: weight is added in stages, often in a protective boot first.
- Long term: custom footwear and insoles to spread pressure. See Custom orthotics after healing.
How long does it take to walk after heel flap surgery?
Most patients stay fully off the heel for several weeks, commonly about 4 to 6, then begin partial weight-bearing in a protective boot. Full walking in custom footwear usually follows over the next few weeks. Rushing this step is one of the most common reasons a heel flap breaks down.
When is saving the heel not the right choice?
Saving the heel is unwise when the conditions for healing cannot be met. In these cases, a planned amputation may give a faster, safer return to walking than repeated failed operations.
- Blood flow is poor and cannot be improved by a vascular procedure.
- The patient cannot keep weight off the heel for the weeks needed.
- Infection is spreading or threatening life despite surgery and antibiotics.
- Most of the heel bone is destroyed, leaving no stable base to walk on.
- Serious heart or kidney illness makes long or repeated surgery unsafe.
- The patient could not walk before the ulcer and saving the heel would not improve daily life.
This is a shared decision with the patient and family, not a single surgeon's call.
Who supervises treatment? Diabetic foot ulcer doctor in bhavnagar families can consult
Heel salvage is supervised by Dr. Ashutosh Shah, plastic and reconstructive surgeon, who plans the debridement and flap and leads follow-up. In our practice, sugar and kidney function are monitored alongside the wound from the first visit, because a flap rarely survives when either is out of control.
- Blood sugar: daily readings during admission and HbA1c, managed with the patient's physician or diabetologist.
- Kidney function: creatinine and eGFR before and after surgery; dialysis timing planned with the nephrologist where needed.
- Blood flow: vascular review before surgery and flap checks afterwards.
- Infection: bone culture results guide antibiotic choice and length.
- Pressure care: heels kept off the bed, with turning and offloading checked at every visit.
- Follow-up: regular wound and footwear reviews after healing to prevent recurrence.
Next step: heel ulcer flap surgery works best when blood flow, infection and offloading are sorted out first. Book a heel ulcer review and share recent photographs and reports.
This page is for education and is not a substitute for examination. A hot, swollen or foul-smelling foot, fever or spreading redness needs urgent hospital care.
FAQs
Can a heel ulcer heal without surgery?
A shallow heel ulcer with good blood flow can often heal with offloading, debridement and dressings. Once the ulcer reaches bone, or the bone is infected, healing without surgery is unlikely. Infected bone usually needs removing, and a deep defect over the heel bone usually needs a flap to close it.
Is partial removal of the heel bone safe?
Partial calcanectomy, removing the infected part of the heel bone, is an established way to control bone infection and allow the wound to close. It changes the heel's shape and can weaken push-off when walking, so protective footwear is needed afterwards. Blood flow and the Achilles attachment are checked before surgery.
How long must I stay off my foot after a heel flap?
Usually several weeks, commonly about 4 to 6, with no weight on the heel while the flap heals. Weight is then added slowly, often in a protective boot first. The exact time depends on the flap, any bone surgery and how the wound heals, so follow your surgeon's plan closely.
Can I walk normally after heel reconstruction?
Many people return to walking for daily life, though usually with custom footwear and insoles, and sometimes with a slight change in gait. A flap can feel thicker than normal heel skin and has less feeling. Lifelong foot checks and protective footwear are needed to prevent a new ulcer.
Why did my heel ulcer start while I was in bed?
Lying on your back puts steady pressure on the heels, and with diabetes, numbness and poor circulation, skin can break down within days without pain. The IWGDF advises protecting the heels of anyone who is bedridden, using pillows or heel boots to keep heels off the mattress.
Who monitors sugar and kidneys during treatment?
Dr. Ashutosh Shah supervises the wound and surgery, while blood sugar is managed with your physician or diabetologist and kidney function with a nephrologist when needed. For a diabetic foot ulcer doctor in bhavnagar families can consult, share recent sugar and kidney reports at the first review.
Ready to discuss your concern in person? Book a private consultation at our Adajan or Vesu clinic. Call +91 83205 00350 or use the Book Consultation button.
