Is It Gangrene? Why Your Tissue Is Dying & Medically Approved Next Steps

If you're worried that an area of your skin or a wound isn't healing and may be gangrene, it's important to understand what's happening — and what to do next.

Gangrene is a serious medical condition that occurs when body tissue dies. This usually happens because of a loss of blood supply, a severe infection, or both. While the word sounds alarming — and it can be — early recognition and prompt medical treatment greatly improve outcomes.

Let's break down what gangrene is, why it happens, what signs to look for, and what steps to take next.

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What Is Gangrene?

Gangrene refers to tissue death caused by:

• Poor or blocked blood flow
• Severe bacterial infection
• Trauma or injury
• Complications of chronic diseases such as diabetes

Your tissues need a steady supply of oxygen-rich blood to survive. When blood flow is reduced or cut off, the cells begin to die. If bacteria invade the damaged area, the condition can worsen quickly.

Gangrene most often affects:

• Toes and feet
• Fingers and hands
• Legs
• Surgical wounds
• Areas with poor circulation

In rare cases, it can affect internal organs.

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Why Does Tissue Die?

There are several medically recognized causes of gangrene:

1. Reduced Blood Flow (Ischemia)

Blood carries oxygen and nutrients to your tissues. Conditions that narrow or block blood vessels increase the risk of gangrene, including:

• Peripheral artery disease (PAD)
• Diabetes
• Smoking-related vascular damage
• Severe frostbite
• Blood clots

Without adequate circulation, tissue begins to break down.

2. Infection

Certain bacteria can multiply rapidly in injured tissue, releasing toxins that destroy cells. This can lead to:

• Wet gangrene (infected tissue with swelling and pus)
• Gas gangrene (caused by toxin-producing bacteria that create gas inside tissue)

Infections that progress to gangrene require urgent medical treatment.

3. Trauma or Injury

Crush injuries, burns, or deep wounds can damage blood vessels and introduce bacteria. If untreated, tissue death may follow.

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Types of Gangrene

Understanding the type helps determine the urgency and treatment approach.

Dry Gangrene

• Develops slowly
• Skin may turn brown, purple, or black
• Often affects people with diabetes or circulation problems
• Usually not infected initially

Wet Gangrene

• Associated with bacterial infection
• Swelling, blisters, pus, foul smell
• Spreads more quickly than dry gangrene
• Medical emergency

Gas Gangrene

• Rare but severe
• Caused by toxin-producing bacteria
• Skin may crackle under pressure due to trapped gas
• Requires emergency surgery

Diabetic Gangrene

People with diabetes are at higher risk due to:

• Nerve damage (neuropathy)
• Poor circulation
• Delayed wound healing

If you have diabetes and notice a wound that isn't healing, darkening skin, or signs of infection, you can use a free AI-powered symptom checker to assess your Diabetic Gangrene risk and better understand when to seek medical care.

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Common Symptoms of Gangrene

Symptoms vary depending on the type, but warning signs may include:

• Skin discoloration (blue, purple, black, or green)
• Coldness in the affected area
• Numbness or loss of sensation
• Severe pain (or sometimes no pain due to nerve damage)
• Swelling
• Blisters or sores
• Foul-smelling discharge
• Fever (if infection spreads)

If symptoms appear suddenly or worsen quickly, seek immediate medical care.

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Who Is Most at Risk?

Certain groups are more vulnerable to developing gangrene:

• People with diabetes
• Smokers
• Individuals with peripheral artery disease
• Those with weakened immune systems
• People recovering from surgery
• Individuals with severe injuries or burns

Managing chronic conditions significantly lowers your risk.

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How Doctors Diagnose Gangrene

If gangrene is suspected, a doctor may:

• Perform a physical exam
• Order blood tests to check for infection
• Use imaging (X-ray, MRI, CT scan) to assess tissue damage
• Take tissue or fluid samples to identify bacteria
• Measure blood flow in the affected area

Early diagnosis helps prevent complications such as sepsis or amputation.

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Medically Approved Treatment Options

Treatment depends on the type and severity of gangrene.

1. Antibiotics

Used to treat bacterial infection, often given intravenously in serious cases.

2. Surgical Removal (Debridement)

Dead tissue must be removed to prevent spread. This may involve:

• Minor tissue removal
• More extensive surgery
• In severe cases, amputation

While amputation sounds frightening, it can be life-saving when infection spreads.

3. Restoring Blood Flow

If circulation problems caused the gangrene, doctors may recommend:

• Angioplasty
• Bypass surgery
• Blood-thinning medications

4. Hyperbaric Oxygen Therapy

In some cases, high-pressure oxygen therapy helps kill bacteria and improve healing.

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What Happens If Gangrene Is Left Untreated?

Gangrene does not improve on its own.

Without treatment, complications may include:

• Spread of infection
• Sepsis (a life-threatening whole-body infection)
• Organ failure
• Death

This is why prompt medical evaluation is essential if you suspect gangrene.

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When Should You Seek Immediate Care?

Go to urgent care or the emergency room if you notice:

• Rapidly spreading discoloration
• Severe pain followed by numbness
• Fever with skin changes
• Foul-smelling wound discharge
• Skin that turns black or green
• Sudden swelling with blisters

Even if you're unsure, it's better to be evaluated quickly than to wait.

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Can Gangrene Be Prevented?

Yes, in many cases.

Practical Prevention Tips

• Keep blood sugar well-controlled if you have diabetes
• Inspect feet daily for cuts, blisters, or color changes
• Stop smoking
• Treat wounds promptly
• Keep skin clean and dry
• Wear properly fitted shoes
• Manage circulation problems with your doctor

Prevention is especially important for people at higher risk.

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If You're Worried It Might Be Gangrene

It's normal to feel concerned if you notice unusual skin changes. Not every dark or painful wound is gangrene — but some are.

Ask yourself:

• Is the area getting worse instead of better?
• Is there unusual discoloration?
• Is there a bad smell or discharge?
• Do I have diabetes or circulation problems?

If the answer to any of these is yes, take action.

If you have diabetes and are experiencing concerning symptoms, checking your risk for Diabetic Gangrene using a free AI symptom checker can help you prepare for your doctor's appointment with the right questions and information.

However, online tools do not replace medical care.

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The Bottom Line

Gangrene is serious — but it is treatable, especially when caught early.

Tissue dies when it loses blood supply or becomes severely infected. Risk factors such as diabetes, poor circulation, and smoking increase the likelihood. Symptoms like blackened skin, foul odor, swelling, or unexplained pain should never be ignored.

The key steps are:

• Recognize warning signs
• Seek prompt medical care
• Manage underlying health conditions
• Follow your doctor's treatment plan

If you suspect gangrene or notice rapidly worsening symptoms, speak to a doctor immediately. This condition can become life-threatening if delayed, but timely care greatly improves outcomes.

When it comes to possible gangrene, early action isn't overreacting — it's protecting your health.