Impetigo is a contagious skin disease caused by bacterial infection, and the main focus in treatment is on anti-infection. Erythromycin ointment is a kind of antibiotic ointment, the main treatment is bacterial infection, so erythromycin ointment can treat mild impetigo, impetigo is relatively serious, should be combined with systemic medication in the case of topical medication, you can take oral antibiotics such as roxithromycin amoxicillin, cephalosporin antibiotics. Combined with a variety of topical antibiotic ointments, such as fusidic acid cream, Bactrim ointment, erythromycin ointment, etc., but the specific diagnosis should be given under the guidance of a clinician after a clear diagnosis, before reasonable treatment.