Periodontal (gum) disease is an infection of the tissues that hold your teeth in place. It's typically caused by poor brushing and flossing habits that allow plaque—a sticky film of bacteria—to build up on the teeth and harden. In advanced stages, periodontal disease can lead to sore, bleeding gums; painful chewing problems; and even tooth loss. Symptoms of gum disease include: Bad breath that won’t go away ,Red or swollen gums ,Tender or bleeding gums ,Painful chewing ,Loose teeth