I don't get sick after eating gluten, so it isn't celiac disease.

The ENT said that I had an unusual loss of hearing. I can hear high and low frequencies, but there is more loss in the middle. He thinks I may have been born with it and that it worsened with age (I'm 57). He is also going to retest my hearing in 3 months to make sure it isn't an autoimmune problem like lupus or RA (which I don't have).