I have lost most of the hearing in my left ear and am waiting for an MRI for that but in the meantime, I started getting a really salty taste in my mouth . It seems to be coming from a tooth with a crown on it and it is also on the left side of my mouth on the top. The dentist took off the old crown and has a temporary oni t now and the taste is starting again after 2 days. I am also noticing a very strong metallic likie smell in my urine since yesterday.