Diabetic Foot Ulcers: Prevention, Dressing & Orthosis
Diabetic Foot Ulcers: Prevention, Dressing & the Right Orthosis Can Save a Foot
Imagine a person with diabetes who notices a small blister beneath the foot. It does not hurt, so they continue walking. A few days later, the skin breaks down. The wound becomes deeper, and what seemed like a minor problem turns into a serious medical concern.
Why does this happen?
Diabetes can damage the nerves that warn us about injury and reduce blood flow that supports healing. Repeated pressure from walking, ill-fitting footwear, and delayed wound care can turn a small injury into a diabetic foot ulcer.
The most important message is this: a diabetic foot ulcer is not just a wound. It is often a warning that the foot needs protection, pressure relief, and a coordinated treatment plan.
The good news? Many diabetic foot complications can be prevented, and timely, appropriate care can improve healing and reduce the risk of amputation.
Why do diabetic foot ulcers develop?
Diabetic foot ulcers usually develop through a combination of factors.
Peripheral neuropathy: Nerve damage reduces the ability to feel pain, pressure, heat, or injury.
Repeated pressure: Walking on the same overloaded area can damage skin and deeper tissue.
Foot deformities: Claw toes, prominent metatarsal heads, bunions, or altered foot mechanics may create pressure points.
Poor circulation: Peripheral arterial disease can reduce the oxygen and nutrients needed for healing.
Skin injury: Blisters, cracks, burns, ingrown nails, and ill-fitting footwear can initiate a wound.
Infection: Once the skin barrier breaks, infection can develop and spread.
A person may have more than one of these problems at the same time. That is why treating the visible wound alone is often insufficient.
Prevention begins before the wound appears
The best ulcer is the one that never develops. Daily foot care should become as routine as taking prescribed medication.
A simple daily foot-care routine
Inspect both feet every day. Check the soles, heels, spaces between the toes, and areas around the nails. Use a mirror or ask someone to help if you cannot see the bottom of your feet.
Look for early warning signs. Blisters, redness, swelling, cracks, calluses, drainage, skin colour changes, or a new area of warmth need attention.
Wash gently and dry carefully. Pay particular attention to the spaces between the toes.
Moisturise dry skin. Avoid applying cream between the toes, where excess moisture can encourage skin problems.
Wear properly fitting footwear. Shoes should have adequate depth and width, with no internal seams or objects rubbing against the skin.
Never walk barefoot. Even indoors, small objects and hot surfaces can injure a foot with reduced sensation.
Attend regular foot examinations. Ask your clinician to assess sensation, circulation, skin condition, deformity, and footwear.
People at high risk may need more frequent professional foot checks and specialised footwear. Prevention should be personalised to the patient's circulation, sensation, deformity, previous ulcers, and activity level.
Dressing is important—but it is only one part of treatment
Many families believe that if the wound is cleaned and dressed regularly, it will heal. Unfortunately, this is not always true.
A diabetic foot ulcer may fail to heal despite frequent dressing changes if pressure continues to damage the wound, circulation is poor, infection is untreated, or blood glucose management is inadequate.
According to NICE guidance, standard diabetic foot ulcer care may include offloading, treatment of infection, management of ischaemia, appropriate debridement and wound dressings.
What is the purpose of a proper dressing?
A suitable dressing helps to:
Absorb excess wound fluid without excessively drying the wound.
Maintain an appropriate wound environment.
Protect the wound from external contamination and friction.
Reduce damage to surrounding skin.
Support regular inspection and assessment.
The dressing should be selected according to the wound's depth, drainage, tissue condition, infection status and surrounding skin.
There is no single dressing that is best for every diabetic foot ulcer. Advanced dressings may be helpful in selected situations, but expensive products do not automatically produce better healing.
What about cleaning and debridement?
Dead tissue and callus can interfere with healing and conceal the extent of a wound. A trained clinician may recommend debridement, depending on the wound and blood supply.
However, do not cut calluses, remove dead tissue, or perform debridement at home. A severely ischaemic foot requires particular caution, and treatment should be guided by an appropriately trained wound-care team.
Do not routinely apply household antiseptics, acids, herbal preparations or unprescribed antibiotic creams to an ulcer. These may irritate tissue, delay appropriate care or mask deterioration.
The missing link: pressure relief through proper orthosis and offloading
This is where rehabilitation medicine and orthotic expertise can make a major difference.
Imagine a wound beneath the ball of the foot. Each step transfers body weight to the same area. Even if the dressing is perfect, repeated loading can prevent the wound from healing.
Offloading means reducing pressure and mechanical stress on the injured part of the foot.
It is not simply an optional accessory to wound care. For many plantar ulcers, it is a central part of treatment.
What options may be used?
1. Total contact cast or non-removable knee-high device
For an appropriate plantar forefoot or midfoot ulcer, a non-removable offloading device is often the preferred option when clinically safe and suitable. It redistributes pressure and helps ensure that the device is used consistently. It must be applied and monitored by trained professionals.
2. Removable walker or offloading boot
Useful when a non-removable device is unsuitable or cannot be used. It needs proper fitting, skin checks and adherence. Removing it for every step around the house can undermine its benefit.
3. Custom therapeutic footwear and insoles
Particularly useful for prevention in high-risk feet and for reducing recurrent pressure after healing. The design should reflect foot shape, deformity, pressure distribution and activity.
4. Heel-relief and other site-specific devices
Heel ulcers require a different pressure-relief strategy from ulcers beneath the forefoot. Appropriate heel suspension, positioning or other specialised devices may be needed.
These choices are not interchangeable. The best device depends on the ulcer location, circulation, infection, balance, mobility, deformity and the patient's ability to use it safely.
Why the wrong orthosis can be harmful
An orthosis is intended to protect the foot—not create a new pressure injury.
A poorly fitted device may cause:
New blisters or skin breakdown.
Excess pressure at the edge of a wound.
Friction over bony prominences.
Instability or falls.
Delayed healing because the wound remains overloaded.
A patient with reduced sensation may not feel any of these problems. Therefore, the foot and the device must be checked regularly, especially after a new device is introduced.
The right orthosis is not necessarily the most expensive one. It is the one that safely reduces pressure at the right place and is appropriate for the patient's needs.
Can every patient with a diabetic foot ulcer use an offloading boot?
No. A device that is appropriate for a clean, non-ischaemic plantar ulcer may be unsuitable for a patient with severe infection, significant ischaemia, unstable gait or other complications.
For an infected or poorly perfused foot, urgent clinical assessment takes priority. Offloading must be coordinated with wound care, infection management and vascular assessment.
Common misunderstandings about diabetic foot ulcers
Myth 1: “It doesn't hurt, so it isn't serious.”
Fact: Nerve damage can make a deep ulcer surprisingly painless. The absence of pain does not mean the wound is harmless.
Myth 2: “Good dressing alone will heal it.”
Fact: Wound care must also address pressure, circulation, infection and other factors affecting healing.
Myth 3: “Walking keeps me active, so I should keep walking on the wound.”
Fact: Activity is important, but continued loading of an ulcer can cause further tissue damage. Follow an individualised offloading and mobility plan.
Myth 4: “Any comfortable shoe is suitable.”
Fact: A shoe may feel comfortable yet still concentrate pressure on a vulnerable area. Proper fitting and pressure redistribution matter.
Myth 5: “Antibiotics help every ulcer heal.”
Fact: Antibiotics treat infection; they are not routinely indicated for an ulcer without clinical infection. A clinician must assess whether infection is present and choose appropriate treatment.
Myth 6: “A little redness or a small blister can wait until next week.”
Fact: New skin breakdown in a person with diabetes deserves prompt assessment, even when it is painless or appears minor.
When is a diabetic foot ulcer an emergency?
Seek urgent medical attention
Get urgent assessment if you notice:
Fever, chills or feeling seriously unwell with a foot wound.
Spreading redness, swelling, pus or rapidly worsening drainage.
Black tissue, gangrene, or a foot that becomes cold, pale or blue.
A deep wound, exposed bone or suspected bone infection.
A newly hot, red and swollen foot, even without an open wound—this can indicate acute Charcot foot.
A potentially limb-threatening infection or poor blood supply requires immediate hospital assessment. Do not wait for the next dressing appointment.
What does a complete treatment plan look like?
Effective diabetic foot care is a coordinated process—not just a dressing prescription.
Assess the wound: Document location, size, depth, tissue condition and signs of infection.
Assess blood supply: Examine circulation and arrange vascular investigations when indicated.
Check sensation and foot mechanics: Identify neuropathy, deformities, callus and abnormal pressure distribution.
Treat infection when present: Use appropriate clinical assessment, investigations and antimicrobial treatment.
Choose the right dressing: Match the dressing to the wound and its drainage, while protecting surrounding skin.
Offload the wound: Select an appropriate cast, walker, orthosis, footwear or other pressure-relief strategy.
Review progress regularly: Reassess the wound, device fit, adherence and any new complications.
Prevent recurrence: Once the ulcer heals, continue pressure-relieving footwear, foot surveillance and diabetes management.
A multidisciplinary team may include a diabetologist or physician, wound-care professional, podiatry or foot-care specialist, vascular surgeon, orthotist, orthopaedic surgeon and rehabilitation physician. NICE recommends coordinated specialist services for people with active diabetic foot problems.
The role of rehabilitation medicine
Rehabilitation is not limited to helping someone walk after a wound heals. It can support safe mobility and function throughout treatment.
A rehabilitation physician can help assess:
Foot deformities and abnormal loading patterns.
Walking ability, balance and fall risk.
The need for an orthosis, therapeutic footwear or mobility aid.
Safe transfers and daily activities while weight-bearing is restricted.
Muscle weakness, joint stiffness and deconditioning.
The return to appropriate activity after healing.
For someone who must reduce weight-bearing, a safe mobility plan is especially important. Crutches or walkers may not be suitable for every older adult or person with poor balance; the aid should be selected and fitted individually.
The goal is to protect the wound without unnecessarily sacrificing independence.
The bottom line
A diabetic foot ulcer can begin with a blister, a callus or a minor injury that goes unnoticed. Early detection, appropriate wound care, circulation assessment and effective pressure relief can make a crucial difference.
Remember three essentials:
Inspect the feet daily.
Dress the wound appropriately under professional guidance.
Offload the affected area using the right device.
A dressing protects the wound. An appropriate orthosis reduces harmful pressure. A coordinated treatment plan addresses the reasons the wound developed in the first place.
The goal is not simply to close a wound—it is to preserve the foot, prevent recurrence and help the person return to safe, confident movement.
About the author
Dr. Abhinav Singh,
MBBS, MD (PMR), FIPM
Pain & Rehabilitation Physician
Jeejeevisha Pain Clinic (JPC)
Kendriya Vidhyalaya Road,
Kankarbagh, Patna
Phone: 9003843916
email id : jpcpatna20@gmail.com
Live • Heal • Move Forward
Clinical references: NICE: Diabetic foot problems—prevention and management · International Working Group on the Diabetic Foot (IWGDF): 2023 Guidelines
This article is for public education and does not replace prompt clinical assessment of a diabetic foot wound.
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