Erysipelas - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A bacterial skin infection affecting the upper layers of the skin, characterized by a raised, red, well-defined rash that's warm and tender. It typically affects the face or legs and requires prompt antibiotic treatment.
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Quick Answer
Erysipelas is a bacterial skin infection that affects the upper layers of your skin. It causes a bright red, warm, and tender rash with sharply defined borders, most commonly appearing on the face or lower legs. You might also experience a fever, chills, and fatigue. Because it is an active bacterial infection—usually caused by Streptococcus—it requires prompt treatment with prescription antibiotics. Seeking medical care quickly is important to clear the infection and prevent serious complications from developing. Elevating the area and using cool compresses can help relieve discomfort.
Clinical Context
Erysipelas is a superficial form of cellulitis involving the upper dermis and superficial lymphatics. It's predominantly caused by Group A Streptococcus (Streptococcus pyogenes). The characteristic sharp, raised borders distinguish it from deeper cellulitis. It commonly affects the face (facial erysipelas) and lower legs. Prompt antibiotic treatment is essential to prevent complications like bacteremia, abscess formation, or sepsis.
Symptoms
- Bright red, raised area
- Sharp borders between affected and normal skin
- Warmth and tenderness
- Fever and chills
- Fatigue
- Swollen lymph nodes
- Skin that may blister
- Rapidly spreading redness
Severity & Progression
Causes & Risk Factors
- Group A Streptococcus bacteria (primary cause)
- Entry through skin breaks (wounds, cuts, insect bites)
- Athlete's foot providing entry point
- Lymphedema impairing local immunity
- Chronic skin conditions (eczema, psoriasis)
- Venous insufficiency in legs
Treatment & Management
Erysipelas requires antibiotic treatment, typically penicillin or amoxicillin for uncomplicated cases. Severe cases need IV antibiotics (penicillin G, ceftriaxone). Treatment duration is usually 10-14 days. Elevation of the affected limb reduces swelling. Cool compresses provide comfort. Treating predisposing conditions (athlete's foot, lymphedema) prevents recurrence. Patients with recurrent erysipelas may need long-term prophylactic antibiotics.
- Oral antibiotics (penicillin, amoxicillin) for mild cases
- IV antibiotics for severe cases
- Rest and elevation of affected area
- Cool compresses for comfort
- Pain relievers (acetaminophen, ibuprofen)
- Treating underlying conditions (athlete's foot)
- Compression stockings for leg lymphedema
Red Flags & Complications
Seek medical attention if you experience any of the following:
- Abscess formation
- Bacteremia (blood infection)
- Sepsis
- Lymphedema (from recurrent episodes)
- Post-streptococcal glomerulonephritis (rare)
- Recurrent erysipelas (30% risk)
Self-Care Tips
- Take all antibiotics as prescribed
- Elevate the affected limb
- Apply cool compresses for comfort
- Treat athlete's foot promptly
- Moisturize dry, cracked skin
- Monitor for signs of worsening
When to See a Doctor
Immediately if you have fever with rapidly spreading red rash, especially if accompanied by blistering, confusion, or feeling very unwell
Frequently Asked Questions
How do I know if this red rash is erysipelas?
Erysipelas typically creates a bright red, swollen rash that feels warm and extremely tender. Its key feature is a distinct, raised border that separates the infected skin from the normal skin. It usually appears on the lower legs or face. You might also notice blisters on the rash and feel generally unwell with a fever and chills. A doctor should evaluate any rapidly spreading rash.
How did I catch this infection?
The infection is usually caused by Group A Streptococcus bacteria. These bacteria live on your skin naturally but can cause erysipelas if they enter through a break in the skin. Common entry points include cuts, insect bites, ulcers, or even cracked skin from athlete's foot. People with poor leg circulation, lymphedema, diabetes, or a weakened immune system are more vulnerable to developing the infection.
What is the usual treatment for erysipelas?
Because it is a bacterial infection, erysipelas must be treated with prescription antibiotics, typically penicillin or amoxicillin for 10 to 14 days. Mild cases are treated with oral pills, while severe infections may require intravenous (IV) antibiotics in a hospital. You should also elevate the affected area to reduce swelling, apply cool compresses for comfort, and take over-the-counter pain relievers to manage fever and soreness.
When should I seek urgent medical care for a skin infection?
You should see a doctor immediately if you develop a rapidly spreading red rash, especially if it is accompanied by a high fever, chills, or extreme fatigue. Blistering skin, severe pain, or confusion are also red flags. Early treatment is crucial; delaying care can lead to serious complications such as a bloodstream infection or sepsis, which can be life-threatening.
What is the difference between erysipelas and cellulitis?
While both are bacterial skin infections, they affect different layers of the skin. Erysipelas targets the upper layers and the superficial lymphatic system, resulting in a bright red rash with very sharp, raised edges. Cellulitis affects the deeper layers of the skin and underlying tissues, so its borders are usually less defined and blend more gradually into the surrounding normal skin. Both require medical evaluation and antibiotics.
Can erysipelas come back after I finish treatment?
Yes, unfortunately, there is a significant risk of recurrence. About 30 percent of people who get erysipelas will have it again. Each episode can damage the lymphatic drainage in your skin, making future infections more likely. To prevent it from returning, it is important to treat underlying conditions like athlete's foot, manage leg swelling with compression stockings, and keep your skin well-moisturized to avoid cracks.
Can I just use over-the-counter antibiotic creams to cure it?
No, over-the-counter topical creams will not cure erysipelas. This is a very active, fast-spreading bacterial infection that requires systemic treatment, meaning oral or intravenous prescription antibiotics. Depending on a cream alone is dangerous because it allows the bacteria to spread further into your body, potentially leading to severe complications like abscesses or blood infections. Always consult a healthcare professional.
How can ScanSkinAI help if I suspect I have erysipelas?
ScanSkinAI can analyze photos of your skin to help identify visual features commonly associated with bacterial infections, such as bright redness and sharp, raised borders. However, our AI is solely a screening aid, not a diagnostic tool. Since erysipelas can rapidly worsen and requires prescription antibiotics, you must see a doctor promptly for a true diagnosis and correct medical treatment.
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Medical References
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.