Warning signs, offloading, and why early referral saves the forefoot.
A diabetic foot ulcer is a limb threatening problem disguised as a small wound. Because diabetes blunts the nerves, the ulcer does not hurt the way it should, and because it does not hurt, it waits, for a home remedy, for the next free day, for the dressing to work. Infection does not wait, and the difference between an ulcer treated this week and next month is often the difference between a healed foot and an amputation.
Three problems gang up: nerves that no longer feel pressure or injury, circulation that may be reduced, and sugar levels that feed infection and slow healing. A shoe rubbing, a pebble unnoticed, a nail cut too deep, any of these can start a wound that a healthy foot would announce loudly and a diabetic foot conceals.
What appears on the surface as a coin sized sore frequently tunnels under the skin along tissue planes. Odour, discharge, surrounding redness or swelling, and any black tissue mean the process is advancing. Fever with a foot ulcer means infection is spreading, and that is an emergency.
The ulcer has any odour or discharge; the foot is swollen, warm or red; there is black tissue at the wound; you develop fever; pain appears in a foot that is normally numb; or any wound has failed to shrink after two weeks of dressings. These signs mean the wound needs surgical assessment, not another change of ointment.
Dead and infected tissue is removed surgically, once or in stages, because no dressing heals a wound that contains dead tissue. Pressure is taken off the ulcer with casts, offloading footwear or, in selected feet, internal correction of the deformity that caused the pressure point. Infection is treated based on cultures, sugars are brought under control with the physician, and circulation is assessed and improved where needed. Wounds that cannot close on their own are closed with grafts or flaps once the bed is clean.
A healed diabetic foot is a foot that has proven it can ulcerate. Protective footwear, daily self checks of the soles with a mirror, prompt attention to calluses and nails, and regular follow up prevent the next ulcer, and preventing the next ulcer is how feet are kept for life.
Do not let a parent or spouse dress the same wound at home for a month. Two weeks without clear improvement is the deadline; after that, every week of delay narrows the options and grows the risk. Early is cheap and late is expensive, in every sense.
Diabetes blunts the nerves, so pain is an unreliable alarm. Depth, discharge, odour and spreading redness matter more than pain in a diabetic foot.
Walking on an unprotected ulcer is what keeps it open. Offloading with casts or footwear lets you stay mobile while taking pressure off the wound.
Sugar control is essential but rarely sufficient. Dead tissue must be removed and pressure taken off; the three work together, not as alternatives.
Every day, including between the toes and the sole, using a mirror or a family member's help if you cannot see well. Reduced sensation means an injury can be missed until it is deep.
Closed shoes that fit without pressure points, with a soft insole and enough depth for the toes, and never walking barefoot indoors or outdoors. Where an ulcer has healed, custom offloading footwear is often advised.
Increasing redness spreading around the wound, swelling, warmth, discharge, a bad smell, rising sugar levels or fever all suggest infection and need same day review. Pain may be absent because of nerve damage.
A small ulcer still needs a proper assessment of circulation, sensation and depth, because dressings alone do not correct pressure or poor blood flow. Home dressing continues, but as part of a plan rather than instead of one.
