Hey, so, I ve got a lump behind my uvula, right near the base of my tongue. I can feel it when I swallow, and I can t see it unless I push my tongue down. It s too close to the center of my throat to be one of my tonsils, and I m concerned it might be the C word. I ve been smoking for about a two years, and I ve been having some sinus problems lately – I m hoping it s related to that, but I m not sure!!