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🩺 Medically reviewed by the Health Decoded Guide Editorial Team · Last reviewed: July 2026
🔍 Quick Summary
Cellulitis is a bacterial infection of the deeper layers of the skin.
It can spread quickly and needs early treatment.
1️⃣ Introduction
Cellulitis is a skin infection affecting deeper tissues.
• involves skin and underlying layers
• usually caused by bacteria
• can become serious if untreated
👉 Unlike mild skin infections, cellulitis goes deeper and spreads.
2️⃣ How it happens
Bacteria enter through a break in the skin.
• cuts, wounds, insect bites, or cracks
• bacteria spread into deeper skin layers
• inflammation develops
👉 Even small skin breaks can allow infection in.
3️⃣ Types
• Localized cellulitis
- affects a specific area
- early stage
• Spreading cellulitis
- extends to surrounding tissue
- more severe
👉 Early treatment prevents progression.
4️⃣ Common causes
• Bacteria
- Staphylococcus aureus
- Streptococcus species
• Risk factors
- diabetes
- poor circulation
- skin conditions
→ eczema
5️⃣ Symptoms
• redness
• swelling
• warmth of the skin
• pain or tenderness
👉 These occur due to inflammation and infection.
6️⃣ Associated symptoms
• fever
• chills
• fatigue
• spreading redness
👉 Systemic symptoms suggest more severe infection.
7️⃣🩺 When it becomes dangerous 🚨
• rapidly spreading redness
• severe pain
• fever or chills
• red streaks from the area
👉 These may indicate:
• spreading infection
• need for urgent medical treatment
8️⃣ Management / treatment
• oral or intravenous antibiotics
• rest and elevation of affected area
• wound care and hygiene
9️⃣ Diagnosis
• clinical examination
• based on skin appearance
• blood tests if severe
👉 Diagnosis is usually based on typical signs.
🟢Important message
Cellulitis needs early treatment.
👉 Prompt care prevents complications and spread.
FAQ
• Is cellulitis contagious?
No—it does not spread like impetigo, but bacteria can spread through wounds.
• How quickly does it improve?
With treatment, symptoms usually improve within a few days.
🔗 Related Health Topics
• Skin infections
• Diabetes Type 2
• Skin Care Basic
• Dry Skin
• Wound care
📚 Medical References
• National Health Service (NHS). Cellulitis.
• Centers for Disease Control and Prevention (CDC). About Cellulitis.
• Mayo Clinic. Cellulitis.
• National Institute for Health and Care Excellence (NICE). Cellulitis and erysipelas: antimicrobial prescribing.
• Infectious Diseases Society of America (IDSA). Practice Guidelines for the Diagnosis and Management of Skin and Soft Tissue Infections.
⚠️ Medical Disclaimer
This article is for educational purposes only and does not replace professional medical advice.
If you suspect cellulitis, seek medical care promptly.