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Necrotising Fasciitis Overview: Causes and Treatment

Necrotising fasciitis is a rare, rapidly spreading bacterial infection affecting skin and soft tissues. Learn about causes, symptoms, treatment, and prevention to act fast.

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Written by Dr. D Bhanu Prakash

Reviewed by Dr. Siri Nallapu MBBS

Last updated on 29th Aug, 2025

Necrotising Fasciitis Overview: Causes and Treatment

Necrotising fasciitis (NF) is a rare but serious bacterial infection that affects the deeper layers of the skin and soft tissues. Often called "flesh-eating disease," it spreads quickly and can become life-threatening if not treated immediately. While it is uncommon, understanding its causes, symptoms, and treatment options can help you recognize warning signs and seek prompt medical care.

What is Necrotising Fasciitis?

Necrotising fasciitis is a severe infection caused by bacteria that destroy skin, fat, and the tissue covering muscles (fascia). The infection spreads rapidly, leading to tissue death (necrosis) and, in severe cases, organ failure or death if untreated.

Types of Bacteria That Cause NF

  • Group A Streptococcus (most common)
  • Staphylococcus aureus
  • Clostridium
  • E. coli and Klebsiella (less common)

Symptoms to Watch For

Early symptoms may resemble a minor skin infection, but they worsen quickly. Key signs include:

  • Severe pain (disproportionate to visible injury)
  • Red, swollen, and warm skin that spreads rapidly
  • Fever, chills, and fatigue
  • Blisters or black spots (signs of tissue death)
  • Nausea, dizziness, or confusion (indicates systemic infection)

If you notice these symptoms, seek emergency medical care immediately.

How Do People Get Necrotising Fasciitis?

NF occurs when bacteria enter the body through:

  • Cuts, burns, or surgical wounds
  • Insect bites or puncture wounds
  • Chronic conditions like diabetes or weakened immunity
  • Recent infections (e.g., chickenpox, flu)

Risk Factors:

  • Diabetes (poor circulation increases infection risk)
  • Weakened immune system (due to illness or medications)
  • Obesity or chronic alcohol use
  • Skin injuries or recent surgery

How is Necrotising Fasciitis Diagnosed?

Doctors diagnose NF through:

  • Physical examination (checking for pain, swelling, skin changes)
  • Blood tests (to detect infection and organ function)
  • Imaging tests (MRI, CT scan, or ultrasound)
  • Tissue biopsy (to identify bacteria)

Early diagnosis is crucial—delayed treatment increases complications.

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Treatment Options

NF requires immediate medical intervention, including:

1. Antibiotics

High-dose IV antibiotics target the bacteria.

2. Surgical Debridement

  • Dead tissue is surgically removed to stop infection spread.
  • Multiple surgeries may be needed.

3. Hyperbaric Oxygen Therapy (HBOT)

In some cases, oxygen therapy helps healing.

4. Supportive Care

  • IV fluids, pain management, and wound care.

Consult an Specialist for the best advice

Dr. Promise Jain, General Physician/ Internal Medicine Specialist

Dr. Promise Jain

General Physician/ Internal Medicine Specialist

20 Years • MBBS, DNB Medicine, TDD, MNAMS, PGCDM, CCEBDM, CCMTD,PGDE Senior Consultant- Internal Medicine Head- Department of critical care Apollo Sage Hospital, Bhopal, MP Intensivist, Diabetes, Thyroid , Physician

Bhopal

Apollo Sage Hospitals, Bhopal

800

No Booking Fees

Dr. Subashini Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Subashini Venkatesh

General Physician/ Internal Medicine Specialist

25 Years • MBBS., DCH, MRCGP, Dip (Dermatology), CCT

Chennai

Apollo Hospitals Heart Centre Thousand Lights, Chennai

recommendation

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Dr. Jayasree Krishnan, General Physician/ Internal Medicine Specialist

Dr. Jayasree Krishnan

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17 Years • MBBS, MD (Gen. Med.)

Chennai

Apollo Speciality Hospitals Vanagaram, Chennai

recommendation

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Dr. Srimathy Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Srimathy Venkatesh

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24 Years • DNB (General Med), MRCP

Chennai

Apollo Hospitals Greams Road, Chennai

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Can Necrotising Fasciitis Be Prevented?

While NF is rare, you can lower your risk by:

  • Cleaning wounds properly with soap and water.
  • Covering cuts with sterile bandages.
  • Seeking medical help for deep or infected wounds.
  • Managing chronic conditions like diabetes.

When to See a Doctor?

If you or a loved one has:

  • Unusual pain, swelling, or redness that worsens quickly.
  • Fever with skin changes after an injury.
  • Signs of severe infection (blisters, blackened skin).

Do not wait—seek emergency care immediately.

Need Expert Advice?

If you have concerns about wound infections or risk factors, consult a specialist. You can book a doctor’s consultation or lab tests through Apollo 24|7 for quick and reliable care.

Final Thoughts

Necrotising fasciitis is a medical emergency requiring fast treatment. While rare, awareness of symptoms and risk factors can save lives. Always practice good wound care and seek help if you notice severe or worsening infections.

Consult an Specialist for the best advice

Dr. Promise Jain, General Physician/ Internal Medicine Specialist

Dr. Promise Jain

General Physician/ Internal Medicine Specialist

20 Years • MBBS, DNB Medicine, TDD, MNAMS, PGCDM, CCEBDM, CCMTD,PGDE Senior Consultant- Internal Medicine Head- Department of critical care Apollo Sage Hospital, Bhopal, MP Intensivist, Diabetes, Thyroid , Physician

Bhopal

Apollo Sage Hospitals, Bhopal

800

No Booking Fees

Dr. Subashini Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Subashini Venkatesh

General Physician/ Internal Medicine Specialist

25 Years • MBBS., DCH, MRCGP, Dip (Dermatology), CCT

Chennai

Apollo Hospitals Heart Centre Thousand Lights, Chennai

recommendation

91%

(25+ Patients)

1000

100 Cashback

1000

No Booking Fees

Dr. Jayasree Krishnan, General Physician/ Internal Medicine Specialist

Dr. Jayasree Krishnan

General Physician/ Internal Medicine Specialist

17 Years • MBBS, MD (Gen. Med.)

Chennai

Apollo Speciality Hospitals Vanagaram, Chennai

recommendation

95%

(100+ Patients)

1000

No Booking Fees

Dr. Srimathy Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Srimathy Venkatesh

General Physician/ Internal Medicine Specialist

24 Years • DNB (General Med), MRCP

Chennai

Apollo Hospitals Greams Road, Chennai

recommendation

95%

(200+ Patients)

1000

100 Cashback

1500

No Booking Fees

Consult an Specialist for the best advice

Dr. Promise Jain, General Physician/ Internal Medicine Specialist

Dr. Promise Jain

General Physician/ Internal Medicine Specialist

20 Years • MBBS, DNB Medicine, TDD, MNAMS, PGCDM, CCEBDM, CCMTD,PGDE Senior Consultant- Internal Medicine Head- Department of critical care Apollo Sage Hospital, Bhopal, MP Intensivist, Diabetes, Thyroid , Physician

Bhopal

Apollo Sage Hospitals, Bhopal

800

No Booking Fees

Dr. Subashini Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Subashini Venkatesh

General Physician/ Internal Medicine Specialist

25 Years • MBBS., DCH, MRCGP, Dip (Dermatology), CCT

Chennai

Apollo Hospitals Heart Centre Thousand Lights, Chennai

recommendation

91%

(25+ Patients)

1000

100 Cashback

1000

No Booking Fees

Dr. Jayasree Krishnan, General Physician/ Internal Medicine Specialist

Dr. Jayasree Krishnan

General Physician/ Internal Medicine Specialist

17 Years • MBBS, MD (Gen. Med.)

Chennai

Apollo Speciality Hospitals Vanagaram, Chennai

recommendation

95%

(100+ Patients)

1000

No Booking Fees

Dr. Shamim Anjum, Family Physician

Dr. Shamim Anjum

Family Physician

15 Years • MBBS, M MED (Family Medicine)

Hyderabad

FAMILY CARE CLINIC, Hyderabad

750

300

Dr. Srimathy Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Srimathy Venkatesh

General Physician/ Internal Medicine Specialist

24 Years • DNB (General Med), MRCP

Chennai

Apollo Hospitals Greams Road, Chennai

recommendation

95%

(200+ Patients)

1000

100 Cashback

1500

No Booking Fees

Consult an Specialist for the best advice

Dr. Promise Jain, General Physician/ Internal Medicine Specialist

Dr. Promise Jain

General Physician/ Internal Medicine Specialist

20 Years • MBBS, DNB Medicine, TDD, MNAMS, PGCDM, CCEBDM, CCMTD,PGDE Senior Consultant- Internal Medicine Head- Department of critical care Apollo Sage Hospital, Bhopal, MP Intensivist, Diabetes, Thyroid , Physician

Bhopal

Apollo Sage Hospitals, Bhopal

800

No Booking Fees

Dr. Subashini Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Subashini Venkatesh

General Physician/ Internal Medicine Specialist

25 Years • MBBS., DCH, MRCGP, Dip (Dermatology), CCT

Chennai

Apollo Hospitals Heart Centre Thousand Lights, Chennai

recommendation

91%

(25+ Patients)

1000

100 Cashback

1000

No Booking Fees

Dr. Jayasree Krishnan, General Physician/ Internal Medicine Specialist

Dr. Jayasree Krishnan

General Physician/ Internal Medicine Specialist

17 Years • MBBS, MD (Gen. Med.)

Chennai

Apollo Speciality Hospitals Vanagaram, Chennai

recommendation

95%

(100+ Patients)

1000

No Booking Fees

Dr. Shamim Anjum, Family Physician

Dr. Shamim Anjum

Family Physician

15 Years • MBBS, M MED (Family Medicine)

Hyderabad

FAMILY CARE CLINIC, Hyderabad

750

300

Dr. Srimathy Venkatesh, General Physician/ Internal Medicine Specialist

Dr. Srimathy Venkatesh

General Physician/ Internal Medicine Specialist

24 Years • DNB (General Med), MRCP

Chennai

Apollo Hospitals Greams Road, Chennai

recommendation

95%

(200+ Patients)

1000

100 Cashback

1500

No Booking Fees

Get Your Health Assessed

395(₹988)60% off

550(₹1375)60% off

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