Chronic Wounds: why some wounds don't heal
A wound is considered chronic when it hasn't progressed toward healing within 4 weeks — usually because an underlying factor (poor blood supply, infection, pressure, diabetes, venous disease) keeps overriding the body's normal repair process. Treating that underlying cause alongside the wound itself, not just changing dressings, is what actually resolves chronic wounds.
Why wounds become chronic
A wound is generally considered chronic when it fails to progress through the normal healing stages within about 4 weeks. This almost always means something is actively working against healing — poor blood supply (from diabetes, peripheral vascular disease, or venous insufficiency), ongoing infection, pressure that keeps re-injuring the area, poor nutrition, or an underlying condition that hasn't been identified or controlled. Simply changing dressings repeatedly without addressing this underlying driver is why some wounds seem to "never heal" despite consistent care.
The role of debridement
Débridement — removing dead, damaged, or infected tissue from a wound — is often the single step that unlocks healing in a stalled chronic wound, because dead tissue physically blocks healthy tissue from forming and can harbour ongoing infection. It can be done surgically, with specialised dressings, or with other techniques depending on the wound, and is frequently needed more than once as a wound is brought from a chronic, stalled state into an actively healing one.
When reconstructive surgery is the answer
Many chronic wounds resolve with correct dressing selection, addressing the underlying cause, and debridement — surgery isn't always necessary. Reconstructive surgery (skin grafts or flaps, see flap surgery) becomes the right answer when a wound is too large to close on its own, exposes deeper structures like bone or tendon that need durable coverage, or has failed an adequate trial of non-surgical wound care — at which point continuing to wait usually costs more time and tissue than proceeding with a definitive reconstructive plan.
Frequently asked questions
How long should a wound take to heal before seeing a specialist?
If a wound shows no visible improvement within 2-4 weeks of appropriate care, it warrants reconstructive/wound-specialist assessment rather than continued dressing changes alone.
Do all chronic wounds need surgery?
No — many resolve with correct dressing selection, offloading, infection control, and treating the underlying cause. Surgery (debridement, grafts, flaps) is reserved for wounds that won't close with these measures or that expose deeper structures.
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