Offloading a Diabetic Foot Ulcer: Why Taking the Pressure Off Beats Any Dressing

Quick answer: a plantar diabetic foot ulcer is a pressure problem before it is a dressing problem. Every step puts body weight back through the wound, and tissue that is being crushed daily cannot close no matter how good the dressing is. Offloading, meaning taking the load off that spot, is the single most important part of treatment. A randomised pilot trial at the Universidad Complutense de Madrid (NCT06729411) compared a new minimal offloading dressing against standard felted foam in 40 people, measuring healing at 12 weeks.

Why does offloading matter more than the dressing?

Ulcers on the sole of the foot usually sit under a bony prominence, most often a metatarsal head, where walking concentrates pressure. In diabetes, nerve damage removes the pain signal that would normally make a person limp or rest, so the wound is loaded thousands of times a day without protest. The repeated pressure and shear damage the fragile new tissue at the wound edge faster than the body can lay it down.

This is why a foot ulcer can look clean, be dressed carefully, and still sit unchanged for months. The dressing manages moisture and protects the surface, and getting that part right still matters — we cover it in moist wound healing and how to choose a dressing. It does not change the mechanics. Relieving the load is what allows the wound bed to actually rebuild — provided the person also has the protein and calories to build with, which we cover in nutrition and pressure injuries.

What was the Madrid trial testing?

The trial (NCT06729411), sponsored by the Universidad Complutense de Madrid, randomised 40 people with active plantar diabetes-related foot ulcers one to one into two groups. The experimental group received a minimal offloading dressing, a single layer adhesive pad of medium density ethyl-vinyl acetate with an aperture cut to sit around the ulcer, predesigned for the first metatarsal head, the central metatarsal heads or the fifth metatarsal. The control group received the conventional approach, 15 mm felted foam. Importantly, everyone in both arms also wore a removable ankle-high offloading device.

The primary outcome was the healing rate at 12 weeks, with healing defined as intact skin at the ulcer site with complete epithelialisation and no drainage. Secondary outcomes tracked minor or major amputations over six months. The study ran from December 2023 to September 2024 and is listed as completed.

Honest status: no results have been posted to the ClinicalTrials.gov record, so we cannot tell you which dressing performed better. What the trial design does tell you is what specialists are actually arguing about, and it is not which dressing to buy. Both arms got a removable offloading device as a given. The question under study was only how best to redistribute pressure locally on top of that.

What are the usual ways to offload a foot ulcer?

• Total contact casting. A cast that spreads load across the whole foot and lower leg. It is widely regarded as the most effective option, largely because the person cannot take it off.
• Removable walkers and offloading boots. Effective when worn, and easier for bathing, sleeping and inspecting the wound. The obvious weakness is that they only work while they are on the foot.
• Felted foam and offloading pads. A layer applied to the foot with an aperture around the ulcer so that surrounding tissue carries the load instead. This is the family of devices the Madrid trial was comparing.
• Therapeutic footwear and custom insoles. Mainly for preventing recurrence after healing rather than treating an open ulcer.
• Reducing steps. Unglamorous, but fewer loading cycles genuinely means less repeated trauma while the wound closes.

Which of these is appropriate depends on the ulcer, the circulation, the presence of infection, balance and fall risk, and the person's daily life. This is a decision for a podiatrist or a diabetic foot service, not a self-selection.

What can you do practically while under care?

• Wear the device, all the time. The commonest reason offloading fails is the walker sitting by the door. Even short unprotected trips to the kitchen or the bathroom count.
• Never walk barefoot indoors. Home flooring is where a great many of these injuries start and restart.
• Inspect the foot daily. Use a mirror or ask someone else. Look for new redness, blisters, dark patches or rubbing from the device itself.
• Keep the dressing dry and change it as directed. A soaked dressing macerates the surrounding skin and widens the wound.
• Do not trim callus yourself. Callus around an ulcer does need managing, but with a scalpel in trained hands, not with home implements or corn plasters.
• Watch for pressure from the offloading device. Devices that redistribute load can create a new sore somewhere else. Report any new tender or red area.

When should you seek help urgently?

Contact your doctor or diabetic foot service the same day if you notice spreading redness or warmth, swelling, increasing or foul-smelling discharge, fever or feeling generally unwell, a sudden increase in pain, or the wound turning black. Diabetic foot infection can move quickly, and delay is the main driver of the outcomes everybody wants to avoid. A wound that has not visibly improved over two to four weeks of proper care also warrants review rather than more of the same.

This article is general information, not medical advice. Diabetic foot ulcers need assessment by a qualified professional, including checks of circulation and sensation, and offloading choices differ from person to person. Please consult your doctor, podiatrist or wound care nurse.

Related reading: Diabetic Foot Care at Home: A Complete Guide for Singapore, Best Wound Dressings in Singapore (2026), or browse offloading-friendly dressings in our wound care range.

EMIS+ supplies wound care, continence and ostomy products to homes, clinics and care facilities across Singapore. If you are caring for someone with a foot ulcer and are not sure what dressings you need, you can browse our range at www.emis.asia.