Treating Cellulitis: What To Do When a Skin Infection Spreads

Expert Evaluation and Evidence-Based Management

Cellulitis can start as a small red patch before quickly spreading to surrounding areas. Affected skin becomes warm, tender, swollen, and sometimes shiny. Because cellulitis is a bacterial infection of deeper skin layers, prompt treatment can reduce the risk of complications.

What Cellulitis Is and Why It Needs Prompt Treatment

Cellulitis is a bacterial infection of the skin and the tissue beneath it. It typically affects the legs, but it can occur anywhere, including the arms and the face. The infection begins when bacteria enter through a break in the skin, leading to symptoms like:

• Redness that expands throughout the infected area
• Swelling and tenderness
• Warm skin over the area
• Pain that feels deeper than a surface rash
• Fever or chills in more serious cases

Cellulitis often starts at an entry point. That can include:

• Cuts and scrapes
• Cracked skin from athlete’s foot
• Eczema flare
• Ingrown hair
• Insect bites
• Surgical wound

If the underlying trigger is not treated, cellulitis can recur. 

Causes and Risk Factors for Cellulitis

Most cellulitis cases are caused by streptococci or staphylococci. Your clinician will consider your location, history, and the appearance of the infection when choosing antibiotics. Group A strep is one cause of cellulitis. Staph bacteria, including MRSA in some situations, can also be involved, especially when there is an abscess or pus. 

The risk of developing cellulitis is higher when you have:

• Skin conditions that crack or inflame skin, such as eczema
• Athlete’s foot or chronic toe-web breakdown
• Swelling in the legs (lymphedema or chronic edema)
• Diabetes or poor circulation
• Obesity
• A history of prior cellulitis

When To Seek Urgent Care or Emergency Help

Some cases of cellulitis can be treated with oral antibiotics and close monitoring. Other cases need urgent evaluation from a qualified healthcare professional. Seek urgent care if you experience:

• Fever, chills, or feeling very ill
• Redness spreading quickly over hours
• Severe pain out of proportion to the appearance
• Red streaks moving away from the area
• Facial cellulitis, especially around the eyes
• New confusion or dizziness

If you have diabetes, neuropathy, poor circulation, or immune suppression, seek care as soon as possible. Small wounds can become bigger problems faster.

Treating Cellulitis: What Treatment Usually Includes

Some cases of cellulitis require antibiotics to treat bacterial infections. Even if you feel better, you should finish the prescribed course to prevent relapse. If symptoms are worsening after starting antibiotics, contact your clinician promptly. Your clinician may also look for an abscess that may need drainage.

Additional steps you can take at home can help you manage the symptoms:

• Elevate the affected limb to reduce swelling.
• Keep the area clean and follow wound care instructions.
• Mark the edge of redness with a pen to track spread.
• Use pain relief if you can take it safely.
• Avoid tight clothing that rubs the area.

When Drainage or Imaging Is Needed

Drainage may be needed if there is pus. If the infection is not responding to treatment or the location is complex, imaging can help rule out deeper infection. Your clinician will decide this based on exam findings and your overall health.

Quick Guide: Treating Cellulitis In Different Settings

Preventing Recurring Cellulitis 

Recurrence is common when the entry point stays open. Prevention focuses on protecting the skin barrier and treating underlying conditions such as athlete’s foot, eczema, and chronic swelling.

Common care methods to prevent recurring flare-ups include:

• Moisturizing dry skin to reduce cracks
• Treating eczema flares, athlete’s foot, and other conditions that can lead to cellulitis
• Cleaning and covering minor cuts
• Using compression strategies for chronic leg swelling
• Keeping feet dry to reduce the risk of bacterial infection

How Connolly Dermatology Helps With Treating Cellulitis

Connolly Dermatology can help you address cellulitis and other dermatological issues. We can evaluate whether you are dealing with cellulitis, an abscess, dermatitis, or another condition that looks similar. Schedule your appointment today with our experienced providers.