How long does topical antibiotic therapy take to work for impetigo?

Early improvement can mean fewer new blisters or sores, less oozing, and crusts that are no longer spreading. Existing crusts and redness do not disappear immediately because the surface still needs to repair. Impetigo can spread by touching, scratching, or sharing towels, so improvement in one area does not mean infection elsewhere has settled.

Wash your hands before and after applying the medicine. Gently clean the area as directed, pat it dry, and apply only the prescribed amount to the affected skin. Do not share the tube, towels, clothing, or bedding. Keep fingernails short and avoid picking the crusts. Finish the instructed course unless the prescriber tells you to stop, even when the lesions look better. A clinician may choose a different approach if the infection is extensive, recurrent, or not responding.

Arrange a review if new lesions continue appearing, redness is spreading, pain or swelling is increasing, or there is no clear improvement after several days of correct use. Seek urgent care for fever, marked weakness, rapidly spreading redness, severe swelling near the eye, or involvement of the eye. Children who seem very unwell also need prompt assessment.

Ask which changes should appear first, how long to use the medicine, whether school, work, or sports precautions are needed, and what to do if the skin becomes more irritated after application.