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Complications

Feet: when sensation, circulation, and healing interact

Follow the pathway from unnoticed injury to ulceration and infection, and understand opportunities to interrupt it.

2 min readEasy read2 sourcesChecked 30 Sept 2026Established

By The Diabetes Guide editorial project · Updated 30 Sept 2026

On this page
In simple words

Numb feet, poor blood flow and shoe pressure can lead to sores that heal slowly and sometimes get infected.

  1. Step 1: A quiet injury

    If feelings are dull, a blister or pebble in the shoe may go unnoticed.

    For example: A smoke alarm with no batteries.

  2. Step 2: Slow healing

    Blood flow to the feet may be poor, so healing is slower and infection is easier.

    For example: A garden with a blocked water pipe grows slowly.

  3. Step 3: Act quickly

    New wounds, spreading redness, discharge or fever need prompt attention.

    For example: Fix a small leak before it floods the room.

Remember: A wound that does not hurt can still be serious. Check feet often.

The full story

Want more? Below is the detailed version with the real science words. It is fine to skip it.

What happens inside the body?

Loss of protective sensation can hide pressure injury. Reduced circulation impairs tissue supply, while deformity or ill-fitting footwear can concentrate pressure. An ulcer is an open wound; infection and poor healing can compound the problem. Amputation is a possible severe outcome, not an inevitable endpoint. 1

What changes the outcome?

New wounds, spreading redness, discharge, fever or discoloration warrant prompt clinical attention. Foot care includes examination, pressure management, circulation assessment and appropriate infection treatment. A wound that does not hurt can still be important.

Why earlier care matters

Earlier glucose management can have lasting benefits, but risk also depends on blood pressure, lipids, smoking and access to organ-specific care. Remission does not automatically erase prior injury or remove the need for surveillance. 2

Trace the evidence

Sources and further reading

Source checking is an editorial literature check, not independent medical review. This page is for learning. It cannot diagnose you or make a treatment plan. Evidence labels describe the cited claims, not the whole topic.

What does “Established” mean?

Doctors and scientists agree. This is well known. Like “the sun rises in the east”.

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