Cellulitis typically causes swelling and skin redness, with some patients experiencing blisters, red spots or skin dimpling, notes Mayo Clinic. The bacterial infection most commonly occurs on the skin of the lower legs, but it can affect all areas of the body. Persons exhibiting cellulitis symptoms require immediate medical evaluation.
To diagnose cellulitis, doctors evaluate the appearance of the skin, sometimes ordering blood tests or wound culture tests to rule out other potential disorders. Cellulitis spreads rapidly and can become life-threatening, according to Mayo Clinic. Factors that increase a person's risk of contracting cellulitis include previous history of cellulitis, a weakened immune system, skin injury, obesity and intravenous drug use.