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Symptoms of Sinus Pressure. Sinus Pressure is a symptom associated with various respiratory conditions. Pressure in the sinuses often results from an accumulation of fluids and a swelling of the blood vessels in the mucus membrane lining of the sinuses. There are several symptoms that are associated with Sinusitis and Sinus infections.
This can block the Eustachian Tube. As a result air cannot reach the middle ear, so the pressure there decreases. When the pressure is lower in the middle ear than in the ear canal, it causes the eardrum to bulge inward. The bulging of the ear-drum can cause pain and as a result, one may experience tinnitus symptoms. So yes, I think that sinus infection can very much cause Tinnitus.