Otitis externa.

Abstract

Otitis externa most commonly caused by Pseudomonas aeruginosa or Staphylococcus aureus bacteria.Examination noted to have swelling of ear canal, possible discharge, pain on movement of pinna or tragus.TreatmentFor intact tympanic membrane, can use neomycin, polymyxin B, or trimethoprim sulfate.For non-intact tympanic membrane or tympanostomy tube–associated otorrhea, use fluoroquinolones (eg, ciprofloxacin, ofloxacin).Malignant otitis externa (ie, rapid soft tissue and bone involvement) is characterized by severe pain, copious discharge, and possible facial paralysis and requires admission with imaging and intravenous antibiotics.