Cellulitis is a common bacterial skin infection. It can result in localised redness, pain, swelling, and systemic symptoms - see images below. Without treatment, cellulitis can be life-threatening. The word "cellulitis" actually means "inflammation of the cells." Specifically, cellulitis refers to an infection of the tissue just below the skin surface. In humans, the skin and the tissues under the skin are the most common locations for microbial infection. Skin is the first defense against invading bacteria and other microbes. An infection can occur when this normally strong barrier is damaged due to surgery, injury, or a burn. Even something as small as a scratch or an insect bite ... Cellulitis is a bacterial infection of the inner layers of the skin, usually caused by streptococci or staphylococci. It causes redness, pain, swelling, and fever, and can be treated with antibiotics and elevation of the affected area. Cellulitis is a bacterial infection of the skin and soft tissues that causes swelling, redness, tenderness, and warmth. Read about treatment, antibiotics, symptoms, signs, diagnosis, prevention, and prognosis.