Are there any other explainable reasons why one might have a loss of smell or taste besides covid? My left nostril has a burning sensation with an ever so slight drainage and I couldn't taste my dinner really this evening. Airways are completely clear with no hindrance to breathing. I can still smell strong scents like soap when held close to my nose but the sense is certainly reduced. I was around a non symptomatic at the time person about 2 weeks ago. Got a mouth swab test late last week which came back negative. Loss of smell/taste was the one thing that somewhat concerned me about this whole thing and am hoping there might be another explanation.