Not Sinus Pressure: There is not really a sinus behind your ear. There is a small collection of holes in the bone called mastoid air cells. These can so entires get infected. Best way to assess this is CT scan. Before doing that I might try a course of antibiotics prescribed by your doctor.
Answered 9/12/2014
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Eustachian tube: Sinus inflammation, either infectious or allergic, may cause eustachian tube dysfunction. This can result in ear pressure or fluid. Nasal steroid spray may help both these symptoms. Given the duration of these symptoms, a visit to your physician is warranted. Good luck.
Answered 4/19/2016
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