If your mouth or jaw is aching, you experience pain while chewing or you have swollen gums, you may have an abscessed tooth. These are just a few of the symptoms that can occur when the soft tissue inside the root canal of a tooth called pulp dies, becomes inflamed and goes untreated. The resulting infection in or around the root of the tooth may or may not be painful but any ongoing symptoms should be tended by an Endodontist who specializes in treating infected teeth and pulp.