Drainage of Abscess
Urgent surgical release of pus collected inside the foot, which antibiotics alone cannot clear.
Key Takeaways
- Antibiotics cannot penetrate a closed collection of pus, so drainage comes first.
- Diabetic foot abscesses spread along tendon planes toward the leg, often silently.
- Swelling with a mild fever or a sudden sugar rise may be the only warning.
- Same day drainage saves tissue that a week of waiting would cost.
What Is a Foot Abscess?
Abscess: a walled off collection of pus within tissue, which builds pressure and cannot be cleared by antibiotics alone.
Bacteria enter through an ulcer or crack, multiply and produce pus. The body walls the collection off, which sounds protective but actually creates a sealed pocket that medication cannot reach. Meanwhile, pressure inside strangles the surrounding tissue.
Why Is It More Dangerous in Diabetes?
Because the warnings are muted. Neuropathy removes the throbbing pain that would send anyone else to hospital, and the immune response is blunted, so fever often never appears. Consequently, patients present late with an abscess that has already tracked along tendon sheaths into the midfoot.
In practice, a sudden unexplained rise in blood sugar is frequently the earliest clue we get.
How Is Drainage Performed?
- The collection is opened widely enough to release all pus
- Dead and infected tissue is removed at the same sitting
- Pus is sent for culture so antibiotics can be targeted properly
- The wound is left open to drain rather than closed immediately
- Dressings and review follow, with closure planned once infection clears
What Happens Afterwards?
Antibiotics continue based on culture results, and blood sugar is controlled tightly because high glucose weakens the immune response. Regular wound care follows, and reconstruction is planned later if the defect is large.
What Does It Cost and What Recovery Is Realistic?
Simple drainage under local anaesthetic in the clinic is modest. Extensive infection requiring theatre and admission costs considerably more, which is another reason to come early. Full costs are explained before treatment, and in emergencies treatment starts first with charges discussed alongside.
Expect the wound to look worse immediately after drainage, since it is deliberately left open. That is normal and necessary, and healing then progresses steadily over the following weeks.