Have Cough And Sinusitus. On Antibiotic And Antihistamine. Feels Mucus Drains From Ear Into Throat. Suggest?
The problem you have right now that is, cough with feeling of mucous drain from your ear into throat may also be a symptom of chronic sinusitis that you had. Usually, chronic sinusitis has some underlying causes like nasal polyps or associated with upper airways structural abnormalities. As you already had a course of antibiotics, surgical intervention may benefit frequent recurrence. But the decision completely depends on the physical examination by an ENT doctor.
Futhermore, we need to exclude dental root infection, vasomotor rhinitis. Also, need to check that appropriate sensitive antibiotics have been given as there are symptoms of infection still.
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Wish you good health.