Mar 19, - The symptoms of an ear infection in adults are: Earache (either a sharp, sudden pain or a dull, continuous pain) A sharp stabbing pain with immediate warm drainage from the ear canal. A feeling of fullness in the ear. Nausea. Muffled hearing. Ear drainage. May 16, - Ear infection — Comprehensive overview covers symptoms, treatment, prevention, Children are more likely than adults to get ear infections.