cellulitis overview for patients

Overview

Cellulitis is a common and treatable bacterial skin infection. It affects the deeper layers of the skin and the tissue just beneath it. It often appears as a red, swollen, warm, and painful area of skin, most commonly on the legs. With prompt medical care, most people recover completely.

Yes, cellulitis is a relatively common bacterial skin infection. Many people are treated for it each year.

Anyone can get cellulitis, but you may be at higher risk if you have diabetes, a weakened immune system, or a skin condition like eczema. It also more commonly occurs in older adults and people with lymphedema (swelling from fluid build-up).

Symptoms

Common symptoms

• Redness on the skin
• Swelling or puffiness
• Warmth in the affected area
• Pain or tenderness
• Fever or chills
• Tight, shiny skin or blisters

Symptoms in children

• In children, cellulitis may also cause irritability, tiredness, fever, and loss of appetite.
• The child may cry when the affected area is touched.

Symptoms in older adults

• Older adults might have confusion or a sudden change in mental state, along with the usual skin signs.
• They may also have a higher chance of the infection spreading.

Causes

Main causes

• Bacteria entering through a cut, scrape, scratch, or burn
• Other breaks in skin such as insect bites, injection sites, or skin ulcers
• Swelling in a limb (lymphedema) that may allow bacteria to settle in the skin

Risk factors

• Diabetes
• Poor blood circulation
• A weakened immune system
• Skin conditions like eczema or athlete's foot
• Obesity
• Recent surgery or hospital stay

When to see a doctor

See a doctor urgently if:

• See a healthcare provider promptly if you have a red, swollen, painful area that feels warm, especially if you have a fever or chills.
• Same-day care is recommended because the infection can spread quickly.

Book a routine appointment if:

• Make an appointment if you notice a minor area of redness or swelling that does not improve after a day or two.
• Also ask for a follow-up if your symptoms return after treatment.

Diagnosis

A healthcare provider will usually diagnose cellulitis by looking at your skin and asking about your symptoms. They will check the affected area and may look for signs of infection elsewhere.

Tests that may be done

• There is usually no specific test needed.
• If the infection is severe or keeps coming back, a blood test or a swab of the affected area might be taken.

What to expect at your appointment

During your visit, the healthcare provider will examine the affected area carefully. They may mark the border of the redness to check if it spreads. In most cases, treatment starts right away, and you'll receive advice on how to care for your skin.

Treatment

The main treatment for cellulitis is antibiotics to kill the bacteria. In many cases, you can take antibiotics by mouth at home. More severe cases may require treatment in a hospital with intravenous (IV) antibiotics. Your healthcare provider will decide the best approach based on your situation.

Self-care at home

• Keep the affected area clean and dry.
• Rest and elevate the affected limb to reduce swelling.
• Use a cool, damp cloth for comfort.
• Ask your pharmacist or healthcare provider about safe pain relief options.

Medical treatments

Medical treatment focuses on antibiotics to fight the bacterial infection. Depending on the severity, antibiotics may be given as pills or through an IV in a hospital. Your healthcare provider will tell you the correct dose and how long to take them. Always finish the full course, even if you feel better.

When is surgery considered?

Surgery is rarely needed for cellulitis. However, if an abscess (a pocket of pus) forms, a healthcare provider may need to drain it.

Living with this condition

During recovery, get plenty of rest, keep the affected area elevated, and take care of your skin. Watch for signs that the infection is spreading, and follow up with your healthcare provider as advised. Most people start to feel better within a few days of treatment.

Lifestyle tips

• Protect your skin from cuts and scratches.
• Moisturise your skin to prevent cracks.
• Treat any underlying skin conditions like athlete's foot.
• Wear appropriate footwear to avoid injuries to your feet.

Diet and exercise

Eating a healthy, balanced diet helps your immune system fight infection. Gentle movement may help with circulation, but rest the affected area while it's healing. Speak to your healthcare provider about safe physical activity.

Mental health and emotional wellbeing

Being unwell can be stressful. You may feel worried about the infection or how it will affect your daily life. It's natural to feel this way. Talking to family, friends, or a professional can help.

Prevention

You can reduce your risk of cellulitis by keeping your skin healthy and avoiding breaks in the skin. If you have a cut or wound, clean it well and apply a sterile dressing. Moisturising dry skin and managing conditions like diabetes or lymphedema also help.

Vaccines

There is no vaccine that specifically prevents cellulitis, but staying up to date with recommended vaccinations can help prevent other infections that might lead to skin complications.

Screening programmes

There is no routine screening for cellulitis. The best thing is to be aware of any changes in your skin and talk to a healthcare provider if you notice a red, warm, painful area.

Complications

If left untreated

• The infection can spread into the bloodstream (sepsis).
• It can spread to underlying tissues, causing deeper infections.
• Damage to lymphatic vessels may lead to long-term swelling (lymphedema).
• A pocket of pus (abscess) might form and need draining.

Long-term outlook

With prompt and proper treatment, most people recover from cellulitis completely. It may take a few days to two weeks to improve. Following your healthcare provider's advice and finishing your prescribed medication gives you the best chance of a full recovery.

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