Most wounds heal. A cut, a scrape, a minor surgical incision — the body handles these without much help. But some wounds do not follow that path. They stall, they worsen, they become infected, and eventually they become a clinical emergency that could have been addressed weeks or months earlier if someone had recognized the warning signs.

My name is Dr. Cyrus Garmo. I am board-certified in Internal Medicine and certified in Hyperbaric Medicine through ATMO, recognized by the Undersea and Hyperbaric Medical Society. At RevitalizeMe Hyperbaric Oxygen and Wound Care in Saginaw, Michigan, I want to give every patient and family member the information they need to recognize when a wound has crossed from something manageable at home to something that needs a specialist’s attention. That line is clearer than most people think.

In this article:

• The four-week rule — the clinical threshold that matters
• Signs of infection that should prompt immediate attention
• Pain that is getting worse not better
• Wounds that look or smell wrong
• Who is at highest risk for wound complications
• What happens if you wait too long
• How to get evaluated at RevitalizeMe

The Four-Week Rule — The Clinical Threshold That Matters

The general clinical threshold for when a wound becomes a concern is four weeks without measurable progress. This is the standard used across wound care medicine and it is the threshold Medicare uses when evaluating whether a patient qualifies for advanced wound care interventions.

A wound that is healing — even slowly — will show measurable change over four weeks. It will be smaller. The wound bed will look healthier. Drainage will be decreasing. The surrounding skin will be improving. If none of those things are true after four weeks of appropriate care, the wound is not healing on its own and it needs a specialist’s evaluation.

Four weeks is the outer boundary. In many cases the right move is to seek evaluation earlier — particularly for patients with diabetes, vascular disease, compromised immune function, or any wound that appears infected. For those patients, a wound that is not improving after two weeks deserves attention. Do not wait for the four-week mark if the wound looks wrong or the patient has a condition that is known to impair healing.

Signs of Infection That Should Prompt Immediate Attention

Infection is the most urgent warning sign. A wound infection that is not recognized and treated early can progress to deep tissue involvement, osteomyelitis, sepsis, and in the worst cases, loss of a limb or worse. These are not theoretical risks — they are outcomes I have seen when patients waited too long.

Call your physician or contact a wound specialist the same day if you notice any of the following:

Increasing redness spreading from the wound edges. Some redness immediately around a wound is normal. Redness that is expanding outward from the wound edge — especially if it is warm to the touch, streaky, or spreading rapidly — is a sign of spreading infection. This needs same-day evaluation.

Increased warmth in the wound area. Warmth indicates inflammation and can signal infection even before other signs appear, particularly in diabetic patients who may not have significant pain due to neuropathy.

New or worsening swelling around the wound. Some swelling is expected in the early phases of healing. Swelling that is increasing rather than decreasing, particularly if accompanied by warmth or redness, warrants evaluation.

Pus or cloudy drainage. Clear or slightly yellow serous drainage can be normal. Thick, cloudy, or purulent drainage — especially if it has increased in volume — indicates infection. Any drainage that is green or has a foul odor needs to be evaluated promptly.

Fever or chills. Systemic signs of infection — fever above 101 degrees, chills, or feeling generally unwell — combined with an open wound should be evaluated urgently. This may indicate the infection has moved beyond the local wound into the bloodstream.

Pain That Is Getting Worse Not Better

Pain is an important signal and its trajectory matters more than its presence.

A wound that is healing typically becomes less painful over time. A wound that is becoming more painful — or that develops significant new pain after a period of improvement — is telling you something is changing, and usually not for the better. Increasing pain in a wound can indicate infection, worsening tissue involvement, or vascular compromise.

For diabetic patients this warning sign works in the opposite direction. Diabetic neuropathy means that pain may be absent or minimal even in a wound that is seriously infected or that has penetrated to deep tissue. For these patients the absence of pain is not reassurance — it is a reason to be more vigilant about the visual signs I described above, not less.

Rest pain — pain in the foot or lower leg that wakes a patient at night or occurs when they are lying down — is a separate and serious warning sign of arterial insufficiency. This is not a wound pain question — it is a vascular question — but it is relevant because arterial insufficiency is a major driver of non-healing wounds. Rest pain warrants urgent vascular evaluation.

Wounds That Look or Smell Wrong

Trust your instincts on this one. Patients and family members frequently know something is wrong before they have clinical language to describe it.

A wound that smells bad — distinctly foul, not just the mild odor of a covered wound — is a significant warning sign. Certain bacteria produce characteristic odors. A wound with a strong, unpleasant odor should be evaluated. This is not a sign to manage with more frequent dressing changes and hope for improvement.

A wound that is darkening — tissue that is turning gray, black, or appears to be dying — is a sign of necrosis and requires prompt attention. Necrotic tissue cannot heal. It needs to be removed and the underlying tissue environment needs to be assessed and addressed.

A wound that appears to be enlarging rather than shrinking after weeks of treatment is not healing. This is straightforward but important to state — wounds under appropriate treatment should be getting smaller over time. If a wound is the same size or larger after four weeks, the treatment approach needs to change.

Who Is at Highest Risk for Wound Complications

Some patients should be seeking specialist evaluation sooner rather than later for any wound that is not clearly progressing. These are the patients whose underlying conditions significantly impair healing or infection defense.

Diabetic patients are at the top of this list. Diabetes impairs nerve sensation, vascular supply, immune function, and the cellular mechanisms of wound healing simultaneously. A diabetic patient with an open wound on the foot that has not shown improvement in two weeks should see a wound specialist. Do not wait for four weeks.

Patients with peripheral vascular disease have compromised blood flow to the extremities, which means less oxygen, fewer immune cells, and slower healing. These wounds need vascular assessment alongside wound care.

Patients on immunosuppressive medications — including long-term corticosteroids, chemotherapy agents, or medications for autoimmune conditions — have impaired immune responses that affect both healing speed and infection risk.

Patients who have received radiation to an area have permanently altered tissue vascularity in that region. Wounds in previously irradiated tissue heal differently and often require specialized approaches.

Elderly patients generally heal more slowly due to reduced cellular turnover, nutritional factors, and often the presence of multiple comorbidities. A wound in an elderly patient that is not clearly improving deserves earlier evaluation.

What Happens If You Wait Too Long

I want to be direct about this because it is the reason this article matters.

A wound that is not healing and is not being properly managed does not usually stay the same. It tends to get worse. Surface infections progress to deep tissue involvement. Deep tissue infections reach bone. Bone infections become osteomyelitis, which is significantly more difficult to treat and may require surgical debridement. Osteomyelitis in a diabetic patient with vascular compromise can ultimately lead to amputation.

I have seen this cascade in patients who waited months before seeking specialist evaluation. The wound that needed a consultation in week four became a surgical situation in week sixteen. The outcomes were significantly worse than they needed to be.

I am not writing this to create fear. I am writing it because the earlier a non-healing wound gets proper attention, the more options are available and the better the outcomes tend to be. Waiting does not help a non-healing wound. Evaluation does.

How to Get Evaluated at RevitalizeMe

Getting seen at our center is straightforward. You do not need a formal referral from your physician, though we welcome referrals and coordinate directly with referring providers on every case.

RevitalizeMe is located at 3200 Cabaret Trail S., Suite 3, Saginaw, Michigan. We are on the first floor with free parking and full ADA accessibility. We serve patients from across the Great Lakes Bay Region. We accept Medicare, Medicaid, and most major private insurance.

FAQ: When to See a Wound Care Specialist

How long should I wait before seeing a wound care specialist?

The general threshold is four weeks without measurable progress. For patients with diabetes, vascular disease, or any signs of infection, earlier evaluation is appropriate — do not wait four weeks if the wound looks infected or if you have a condition that impairs healing.

What are the signs that a wound is infected?

Signs of wound infection include expanding redness around the wound edges, increasing warmth, new or worsening swelling, cloudy or foul-smelling drainage, pus, and systemic signs like fever or chills. Any of these warrant same-day evaluation by a physician.

My wound does not hurt. Does that mean it is not serious?

Not necessarily, especially for diabetic patients. Diabetic neuropathy reduces or eliminates pain sensation in the feet and lower legs, which means a seriously infected or deteriorating wound may not be painful at all. For diabetic patients, the absence of pain is not reassurance. Visual inspection is the more reliable indicator.

Do I need a referral to see a wound care specialist?

Will my insurance cover a wound care specialist visit?

Medicare, Medicaid, and most major private insurance plans cover wound care services. Our team verifies coverage before treatment begins. Call us and we will check your specific plan before your first visit.

— Dr. Cyrus Garmo, MD
Board-Certified Internal Medicine | Certified Hyperbaric Medicine, ATMO/UHMS
RevitalizeMe Hyperbaric Oxygen and Wound Care, Saginaw, MI
Individual results vary. This article is for informational purposes only and does not constitute medical advice. Please consult your physician regarding your individual care.