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What is Cellulitis Caused by?
Bacteria
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Cellulitis is caused by a bacterial infection of the skin and the tissues immediately below the skin. The bacteria involved is usually either Staphylococci or Streptococci. If a person has a weak immune system, she may develop cellulitis from a different type of bacteria. Bacteria present on uncooked animal products and soil can cause cellulitis as well.
Injuries
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In most cases, there has to be some abrasion on the skin in order for the bacteria to infect the skin or the tissues beneath it. These abrasions can be a surgical cut, a sore, burn, bite or other wound that tears open the skin and exposes it to the bacteria in the environment.
Skin Problems
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Skin conditions such as athlete's foot that allow cracks in the skin provide a way for bacteria to infect the skin tissue and contribute to cellulitis. Other skin problems that cause breaks in the skin that lead to cellulitis include ulcers, eczema and psoriasis. Individuals who have received injections or engage in recreational drug use that requires injecting the drug into the veins increase the probability of contacting cellulitis as well.
Diseases
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Diseases of the lymph system that interfere with proper drainage also allow infection to develop. Likewise, fluid buildup in the legs can cause cellulitis. People with diabetes are particularly susceptible to cellulitis, as is anyone with a weak immune system. The decreased healing properties of someone with poor circulation increases the chance of cellulitis developing, which puts people with peripheral arterial disease at an increased risk of contacting cellulitis.
eHow Article: What is Cellulitis Caused by?
