MedlinePlus Health Topics
disease topic
Patient-friendly
Cellulitis
Source: MedlinePlus Health Topics, U.S. National Library of Medicine
Last synced 8/10/2026Status: primary verified
Cellulitis is an infection of the skin and deep underlying tissues. Group A strep ( streptococcal ) bacteria are the most common cause. The bacteria enter your body when you get an injury such as a bruise, burn, surgical cut, or wound. Symptoms include: Fever and chills Swollen glands or lymph nodes A rash with painful, red, tender skin. The skin may blister and scab over. Your health care provider may take a sample or culture from your skin or do a blood test to identify the bacteria causing infection. Treatment is with antibiotics. They may be oral in mild cases, or intravenous (by IV) for more severe cases.
Educational only
This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.