Otitis Externa Treatment Guidelines Adults : 17.1 epiglottitis 17.2 epistaxis 17.3 rhinitis, allergic, persistent 17.4 sinusitis, bacterial, complicated 17.5 otitis media 17.6 mastoiditis 17.7 otitis externa. Otitis Externa Treatment Guidelines Adults - 17.1 epiglottitis 17.2 epistaxis 17.3 rhinitis, allergic, persistent 17.4 sinusitis, bacterial, complicated 17.5 otitis media 17.6 mastoiditis 17.7 otitis externa.