Risk factors

Several factors put you at increased risk of cellulitis:

• Injury. Any cut, fracture, burn or scrape gives bacteria an entry point.
• Weakened immune system. Conditions that weaken your immune system — such as diabetes, leukemia and HIV/AIDS — leave you more susceptible to infections. Certain medications also can weaken your immune system.
• Skin conditions. Conditions such as eczema, athlete's foot and shingles can cause breaks in the skin, which give bacteria an entry point.
• Chronic swelling of your arms or legs (lymphedema). This condition sometimes follows surgery.
• History of cellulitis. Having had cellulitis before makes you prone to develop it again.
• Obesity. Being overweight or obese increases your risk of developing cellulitis.