Why a wound may not be healing

“Why is my wound not healing?” is one of the first questions people bring to a wound care visit. There is rarely a single answer. A slow wound often has more than one thing working against it.

To close, a wound needs blood flow, building materials, protection and a clean surface. Our guide to how wounds heal describes the normal stages, and this guide covers what gets in the way. Only a clinician who examines you can say which reasons apply to your wound.

Blood flow and swelling

Arteries carry oxygen and nutrients to a wound. Veins and lymph vessels carry fluid away. A problem on either side slows healing.

  • Too little blood coming in. Narrowed arteries, which are more common with smoking, diabetes and age, can leave a foot or leg wound short of the oxygen it needs.
  • Too much fluid staying put. When leg veins do not move blood back up well, fluid pools in the lower legs. Swollen tissue is stretched and waterlogged, and wounds in it struggle to close.

A clinician may check pulses or order a circulation test before choosing a treatment such as compression. Primary care is part of this too, because circulation and vascular health involve the whole body.

Pressure, rubbing and repeated injury

A wound cannot close if it is injured again every day. Sitting or lying on a pressure injury, walking on a foot ulcer or wearing a shoe that rubs can break down new tissue as fast as the body builds it.

People with nerve damage in their feet may not feel this happening. For foot wounds, taking weight off the area, which clinicians call offloading, often matters as much as anything placed on the wound.

Blood sugar, nutrition and general health

Healing draws on the whole body, and several everyday factors can slow it.

  • High blood sugar makes it harder to fight germs and build new tissue. Wound care and diabetes care need to move together.
  • Too little protein, calories or fluid leaves the body short of building materials. Poor appetite is common during illness, so mention it and ask primary care about nutrition and healing.
  • Smoking and nicotine tighten blood vessels and reduce the oxygen reaching the wound.
  • Some medications, including steroids and certain medicines that calm the immune system, can slow repair. Never stop a medication on your own. Our guide to medications that can affect healing lists questions for your prescriber.

Infection and unhealthy tissue in the wound

Germs on the surface, or a layer of dead tissue, can hold a wound in the inflammation stage. Infection in a long-standing wound is often quiet. The clues may be more drainage, a new odor, new pain or fragile tissue that bleeds easily, without obvious redness or fever. Our guide to the signs of wound infection covers what to report.

Dead tissue may need to be removed by a clinician. Now and then, a wound that does not behave as expected has a less common cause, and the clinician may recommend taking a small tissue sample.

What to write down and ask at your next visit

Before the visit, write down:

  • When the wound started and what caused it, if you know
  • Which treatments and dressings have been used, and for how long
  • Whether it has been getting smaller, larger or staying the same
  • Recent blood sugar readings, if you check them
  • Every medication and supplement you take
  • Changes in appetite, weight or swelling

Questions worth asking:

  • What do you think is holding this wound back?
  • Has my circulation been checked?
  • What should my primary care clinician know about?
  • How will we know the plan is working, and when would you change it?

If a wound has had care for a long time without a clear answer, you can ask for a second opinion wound review. Gateway arranges assessments with partner clinicians in Greater St. Louis and the Metro East. Call 314-325-0126 or use the request care form, which asks for contact details only.

When a slow wound needs faster attention

Call the treating clinician promptly for spreading redness, increasing pain, more drainage, a new odor, fever or tissue that turns dark. A foot or toe that suddenly becomes cold, pale, blue or very painful needs emergency care. Call 911 or go to an emergency department.

Call 911 for chest pain, trouble breathing, fainting, sudden confusion or bleeding that will not stop.

Common questions

Can a wound that has been open for months still heal?

Often, yes. Many long-standing wounds begin to close once the cause is found and addressed. Not every wound can heal completely, and no one can promise a result. If closing it is not realistic, the clinician can talk with you about other goals, such as comfort and keeping the wound stable.

Why did my wound improve and then stop?

A wound can make early gains once it is cleaned and dressed well, then stall because a deeper problem is still present. Something may also have changed: more swelling, more time on your feet, higher blood sugar, a new medication or less to eat. Tell the clinician what is different. A plateau is a signal to reassess the plan.

Is it my fault that my wound is not healing?

No. Most of what slows a wound, such as circulation, nerve damage, swelling and other health conditions, is not something you chose. What helps is telling the care team honestly what is hard to do, whether that is keeping a leg raised, staying off a foot or affording food and supplies, so the plan can fit your real life.

What tests might a clinician order for a slow wound?

Common ones include a circulation test for leg and foot wounds, blood work to look at blood sugar, nutrition or signs of infection, a wound culture, and imaging if a bone infection is a concern. The treating clinician decides which tests, if any, are needed and can explain why.

Related pages

General information to help you talk with your own clinician. It is not medical advice, and the treating clinician makes every clinical decision. For a medical emergency, call 911.

Updated October 2026