Wound Healing Problems
When wounds heal slowly, reopen, or fail to close
Quick Facts
- Type: Skin and tissue healing condition
- Common causes: Diabetes, poor circulation, infection
- Warning sign: Spreading redness, pus, fever
- Key step: Treat the underlying cause
Overview
Wound healing is a complex process in which the body repairs damaged skin and tissue through several overlapping stages: stopping bleeding, fighting infection, building new tissue, and finally strengthening the repair. When one or more of these steps is disrupted, a wound may heal slowly, reopen, or fail to close at all. This is described as a wound healing problem or, when a wound persists for weeks or months, a chronic wound.
Wound healing problems can affect surgical incisions, injuries, pressure sores, and ulcers related to diabetes or poor circulation. They are more common in people with certain health conditions and can lead to infection and other complications if not addressed. Identifying and treating the underlying cause is the key to helping a stubborn wound heal.
Symptoms
Signs that a wound is not healing normally include:
- A wound that shows little or no improvement over several weeks
- Edges that fail to close or that pull apart (wound separation)
- Ongoing or increasing pain
- Persistent drainage, oozing, or a foul odor
- Increasing redness, swelling, or warmth around the wound
- Dead or discolored tissue in the wound
- Fever or feeling unwell, which can signal infection
Spreading redness, pus, fever, or red streaks moving away from the wound may indicate a serious infection and need prompt medical attention.
Causes
Many factors can slow or block healing:
- Poor blood flow: Conditions such as peripheral artery disease and venous insufficiency reduce the oxygen and nutrients a wound needs.
- Diabetes: High blood sugar impairs healing and reduces sensation, allowing wounds to worsen unnoticed.
- Infection: Bacteria in a wound delay healing and can cause it to break down.
- Pressure: Constant pressure on one area, as in pressure ulcers, prevents healing.
- Nutrition: Low protein, vitamin, or mineral levels slow tissue repair.
- Medications and conditions: Steroids, chemotherapy, smoking, and a weakened immune system all impair healing.
Risk Factors
- Diabetes
- Poor circulation, including peripheral artery disease and venous insufficiency
- Older age
- Smoking
- Obesity or poor nutrition
- A weakened immune system or use of steroids or chemotherapy
- Pressure from prolonged immobility
- Repeated injury or excessive tension on a wound
Diagnosis
Doctors evaluate a poorly healing wound to find the cause and guide treatment:
- Wound examination: Assessing size, depth, drainage, tissue quality, and signs of infection.
- Circulation testing: Checking blood flow to the area, especially in the legs and feet.
- Blood tests: To check for diabetes, infection, nutritional deficiencies, and other conditions.
- Wound culture: Testing a sample to identify infection and guide antibiotic choice.
- Imaging: When deeper tissue or bone involvement is suspected.
Treatment
Treatment combines local wound care with addressing the underlying cause:
- Wound care: Cleaning, appropriate dressings, removing dead tissue (debridement), and keeping the wound at the right moisture level.
- Treating infection: Antibiotics when infection is present.
- Improving circulation: Compression for venous problems or procedures to restore blood flow when needed.
- Managing the cause: Controlling blood sugar, improving nutrition, relieving pressure, and stopping smoking.
- Advanced therapies: Specialized dressings, negative-pressure wound therapy, skin substitutes, or surgery for difficult wounds.
Specialized wound care clinics can help with complex or non-healing wounds.
Prevention
- Keep wounds clean and follow care instructions after surgery or injury
- Manage diabetes and keep blood sugar controlled
- Avoid smoking, which impairs healing
- Eat a balanced diet with enough protein and vitamins
- Relieve pressure and reposition regularly if immobile
- Check the feet daily if you have diabetes or poor circulation
- Seek early care for wounds that are slow to heal
When to See a Doctor
See a doctor if a wound is not healing after a couple of weeks, is getting larger, or keeps reopening. People with diabetes or poor circulation should seek care early for any wound, especially on the feet.
Seek prompt or emergency care for signs of serious infection, including:
- Spreading redness, swelling, or warmth
- Pus, foul-smelling drainage, or red streaks from the wound
- Fever, chills, or feeling very unwell
- Increasing pain or dark, dead-looking tissue
These can signal a deep or spreading infection that needs urgent treatment.
Frequently Asked Questions
Why is my wound not healing?
Common reasons include poor blood flow, diabetes, infection, ongoing pressure, poor nutrition, and certain medications such as steroids. Smoking and a weakened immune system also slow healing. A doctor can identify the cause so the right treatment can be started.
How long should a wound take to heal?
Many minor wounds heal within one to two weeks, while surgical and larger wounds take longer. A wound that shows little improvement over two to four weeks, or that reopens, is considered a healing problem and should be evaluated.
When is a slow-healing wound an emergency?
Seek urgent care if a wound has spreading redness, pus, a foul odor, red streaks, or dark dead-looking tissue, or if you develop fever and feel very unwell. These can signal a deep or spreading infection that needs prompt treatment.
Can diabetes affect wound healing?
Yes. High blood sugar impairs the healing process and can reduce sensation, so wounds may worsen before they are noticed. People with diabetes should check their feet daily and seek care early for any wound that is slow to heal.
How can I help a wound heal faster?
Keep the wound clean and follow care instructions, eat a balanced diet with enough protein, avoid smoking, manage conditions like diabetes, and relieve pressure on the area. For stubborn wounds, a wound care clinic can offer specialized treatments.
References
- MedlinePlus, U.S. National Library of Medicine. Wounds and Injuries.
- Mayo Clinic. Wound care.
- Centers for Disease Control and Prevention (CDC). Diabetes and foot care.
- Cleveland Clinic. Chronic wounds.