What should you know about a green insect that bites?

Bites and stings can produce a small raised mark, redness, warmth, itching, or soreness. Some people develop several itchy bumps after repeated exposure, while others have little visible change. Scratching can break the skin and allow infection; healing may leave a darker patch called [Post-Inflammatory Hyperpigmentation](/conditions/post-inflammatory-hyperpigmentation/). A photograph of the insect can help, but do not handle it to obtain one.

Move away from the insect, wash the area with soap and water, and apply a cool cloth for short periods. Avoid scratching and remove a visible stinger gently without squeezing it. A pharmacist or clinician may suggest [Antihistamine Treatment](/treatments/medical-dermatology/oral-antihistamine-therapy/) for itch or [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) for selected inflammatory reactions. Use medicines only as directed for your age and health conditions.

Seek emergency help for trouble breathing, swelling of the lips or tongue, faintness, widespread hives, or vomiting after a bite or sting. Arrange medical review when redness rapidly expands, pain becomes severe, pus appears, fever develops, or the bite is near the eye. Persistent swelling or a reaction that keeps returning also deserves assessment.

Ask whether the reaction looks local or infected, which treatment is suitable for your skin and medicines, how long swelling should be watched, and how to reduce exposure around your home or workplace.