How Long Does a Diabetic Foot Ulcer Take to Heal? What Changes the Timeline

There is no single answer to how long a diabetic foot ulcer takes to heal, but there is a reliable way to predict it: check the four things that determine healing, and the timeline follows. Superficial neuropathic ulcers with good blood flow, properly offloaded, often close in six to twelve weeks. The same ulcer with poor arterial flow, or with weight still falling on it, may not close at all.

Lever one: offloading

Pressure is what created the ulcer and pressure is what prevents it closing. Removing load from the wound — with a total contact cast, a removable walker, felted padding or specialised footwear depending on the site — is described in both NICE and IWGDF guidance as a cornerstone of treatment. This is also the lever patients most often underestimate: continuing to walk normally on a plantar ulcer keeps it open regardless of which dressing is used.

Lever two: blood supply

A wound cannot heal on flow that is not there. Where pulses are absent or the ABI or toe pressures are low, arterial imaging follows, and angioplasty or bypass is considered before expecting much from wound care. A large share of ulcers labelled "not healing despite dressings" are simply ischaemic and undiagnosed.

Lever three: infection

Infection is treated on clinical grounds, guided by deep tissue culture rather than surface swabs where possible. Where bone is involved, treatment is longer and imaging is needed to define it. Dead tissue is debrided — repeatedly if necessary — because it neither heals nor allows healing around it.

Lever four: metabolic and general health

• Glycaemic control, which changes both infection risk and tissue repair.
• Nutrition and protein intake, frequently poor in patients who have been unwell for weeks.
• Kidney disease and anaemia, both of which slow healing.
• Smoking, which reduces perfusion in exactly the tissue that needs it.
• Oedema, which must be controlled for a wound bed to granulate.

What a realistic schedule looks like

Expect review at short intervals — often weekly at first — with the wound measured each time rather than described. A wound that has reduced in area by roughly half over four weeks is on track. A wound that has not changed in four weeks is a signal to re-examine the four levers rather than to continue the same dressing for another month.

When the plan needs to change

• No measurable reduction in size after four weeks of correct treatment.
• New or increasing pain, swelling, discharge or odour.
• Bone visible or probed at the base of the wound.
• Fever, rising inflammatory markers, or worsening blood sugar control.
• Black tissue appearing at the wound edges.

After healing: the part most patients are not told

Recurrence rates after a healed diabetic foot ulcer are high, and prevention effectively becomes a permanent part of care: prescribed footwear, regular podiatric review, daily inspection, and prompt reporting of any new lesion. A healed ulcer is a foot in remission rather than a foot cured — that framing is what keeps people vigilant at month eight.

Getting the four levers checked

If a foot wound has been treated for more than a month without clear progress, ask specifically: has the circulation been assessed, is the wound properly offloaded, has deep infection been excluded, and is the sugar control adequate. Those four questions restart most stalled treatment plans.