11 Home Remedies for Abscessed Tooth. Mainly caused by gingivitis and a chipped tooth, an abscessed tooth is an infection between the gums or in tooth’s root, which is very painful. It forms the pus inside the tooth and causes toothache. Bacteria enter in an abscessed tooth and multiply, spreading infection in the bone, which supports the tooth. If not treated on time, it may result in severe life-threatening hitches.