otitis externa vs otitis media

CLINICAL SIGNS OTITIS EXTERNA OTITIS MEDIA
Ear pain Yes Yes, often improved when discharge commences
Discharge Scanty Mod/severe Mucopurulent
Hearing Later onset muffled Early onset
Preceding URTI No Often
Tender ear canal Yes, very No
Periauricular swelling Yes in severe secondary to soft tissue cellulitis No unless mastoiditis
Canal swelling Yes No
Ear drum Can be difficult to visualise due to canal debris Red bulging, oedematous, perforated with mucopus pulsating through
Associated with intracranial complications No (unless immuno- compromised) Yes