I don't taste anything, what's wrong?

Something Fishy Here: The most common cause is something wrong with your smelling apparatus,so if you have a real stuffy nose &/or sinus congestion,that may be the cause. Some unusual mouth problems could do it but that would be pretty obvious to you.There could also be a problem with the nerve that controls smell.That would require evaluation by a neurologist.Unless you work in a sewage treatment plant,get it checked