Gum recession is one of the symptoms of gum disease and occurs when the gum line moves up or down the root of the tooth. Gum recession can be limited to a single tooth or several teeth and has symptoms including root sensitivity, inflammation of the gum tissue, root exposure, root cavity formation, and aesthetic issues. If you do not have enough gum tissue around the teeth, bacteria can cause decay, gum and bone deterioration, or lead to tooth loss.