Cellulitis After a Wasp Sting: What to Know

A wasp sting commonly causes local pain, itching, redness, and swelling. These changes can be pronounced without being cellulitis, especially soon after the sting. Cellulitis is a bacterial infection in deeper skin and usually becomes more tender, hot, and progressively red. Pus, a wound that is not closing, or red streaks can support concern for infection. A large allergic swelling can also look dramatic, so the pattern and change over time matter more than appearance alone.

Wash the area gently with soap and water, remove rings or tight items from a swollen finger or limb, and use a cool pack wrapped in cloth for short periods. Do not scratch, cut, or squeeze the sting site. Draw around the edge of redness and record its size and symptoms. Contact a clinician if the area is expanding, becoming hotter or more painful, or failing to improve. Share any history of severe allergy and any treatment already used.

Call emergency services for trouble breathing, throat or tongue swelling, faintness, or widespread itchy hives after the sting. Seek urgent review for rapidly expanding redness, severe pain, fever, chills, pus, red lines travelling up a limb, or feeling very unwell. Infection can spread beyond the original sting, and prompt treatment reduces the chance of deeper complications.

Ask whether the reaction is allergic, inflammatory, or infectious; whether antibiotics are appropriate; how often to check the skin; and whether you should carry emergency allergy medicine in the future. Mention diabetes, immune conditions, and any previous reaction to insect stings.