Hi doctors. i sometimes have a feeling of fullness only in my right ear if the valsalva technique helps sometimes, can that rule in or rule out a nasopharyngeal mass or could it be eustachian tube dysfunction? what may be other differential criteria?

Ear fullness : Ear fullness sensation is usually from an unequal pressure between the inside portion of the ear behind the eardrum and the outside of the eardrum. The Eustachian to controls this difference in pressure when it is functioning normally. Tumors in the area of the Eustachian tube, infection, allergy can lead to Eustachian tube dysfunction. It is important for your doctor to examine and determine