Diabetic Foot Emergencies: When to Go to Hospital the Same Day

Diabetic foot infection can progress from a small wound to a limb-threatening problem in a day or two, and it can do so without much pain in a neuropathic foot. NICE guidance is explicit that suspected diabetic foot infection requires urgent assessment by a specialist multidisciplinary service. The purpose of this article is to make the threshold clear enough to act on at home.

Go to hospital the same day if you see any of these

• Redness spreading up the foot or ankle, or a red streak running up the leg.
• Swelling of the whole foot with warmth, with or without a visible wound.
• Pus, foul-smelling discharge, or a wound that has suddenly enlarged.
• Any black or grey tissue on a toe, heel or foot.
• Fever, chills, vomiting, confusion, or blood sugars that have suddenly become uncontrollable.
• A blister filled with blood, or skin that is peeling away from a wound.
• Severe new pain in a previously numb foot.

In combination — a spreading red, swollen foot with systemic symptoms and high sugars — this is a surgical emergency, not a dressing problem. Time to source control is what determines how much of the foot can be saved.

What will happen when you arrive

Expect blood tests and inflammatory markers, blood sugar assessment, an X-ray of the foot, examination for pulses and a probe of the wound, and often urgent drainage or debridement of infected tissue in theatre. Intravenous antibiotics are started, guided later by deep culture. Where pulses are absent, arterial imaging is arranged in parallel, because an infected foot with no blood supply needs both problems fixed.

Problems that can safely wait for a clinic appointment

• A dry, stable callus with no dark spot or breach.
• Mildly dry, cracked heel skin without a wound.
• A nail that needs cutting, or mild fungal nail changes.
• Long-standing numbness or night-time burning that has not changed.

These still need attention — they are the precursors — but they need an appointment rather than an emergency room.

Do not do these while waiting

• Do not apply antiseptic powders, turmeric, oils or home poultices to an infected wound.
• Do not cut or squeeze the wound at home.
• Do not start leftover antibiotics — a partial course makes the deep culture less useful.
• Do not walk on the foot; keep it elevated and get transport rather than walking in.

Why the same-day threshold is set so low

The majority of diabetes-related amputations follow an ulcer, and the interval between a manageable infection and one that requires losing tissue is often short. Presenting early costs an outpatient visit; presenting late can cost part of a foot. When in doubt about which category you are in, be assessed the same day.

Have a plan before you need it

Anyone living with diabetic neuropathy should know in advance which hospital they will go to, and keep their diabetes medications list, recent HbA1c and any previous foot imaging in one place. Decisions are faster when that information arrives with the patient.