What should you know about mosquito bite impetigo?

A bite can itch intensely. Scratching damages the surface and gives bacteria an entry point. Impetigo may then appear as blisters, wet sores or yellow-brown crusts, often on exposed areas. [Crusting Skin](/symptoms/skin-crusting/) can have other causes, so examination matters.

Children and adults with an itchy skin condition such as [Atopic Dermatitis](/conditions/atopic-dermatitis/) may be more likely to break the skin through scratching. Infection can pass to other areas or people through hands, towels and close contact.

Wash hands after touching the area, gently cleanse it, keep it covered with a clean dressing and avoid sharing towels, clothing or razors. Keep fingernails short and do not peel crusts away. A clinician may prescribe [Topical Antibiotic Therapy](/treatments/medical-dermatology/topical-antibiotic-therapy/) for a limited area or [Antibiotics For Skin Infection](/treatments/medical-dermatology/antibiotic-therapy-for-skin-infection/) when infection is more extensive or needs medicine by mouth.

Use the prescribed treatment for the instructed course and do not use leftover antibiotics. Clean frequently touched fabrics and avoid close skin contact while sores are open.

Arrange prompt medical review for spreading redness, warmth, swelling, pain, pus, multiple new sores or fever. Seek urgent help if you feel very unwell, the infection is near the eye, or red streaking travels away from the lesion. People with diabetes or reduced immunity should seek advice early.

Ask whether the sores are impetigo, which treatment is appropriate, how long to keep them covered, and when work, school or close contact is safe.