A dental abscess , also referred to as a dentoalveolar abscess, is where pus collects in or around a tooth. The more common types are a periapical abscess or periodontal abscess, where it may occur at the base of the tooth or in the surrounding tissue that holds the tooth in place. These abscesses are usually a complication of other tooth-related problems like tooth decay or a broken tooth. The abscess is not always visible to the naked eye and can even be relatively painless despite the presence of other symptoms like facial swelling. Symptoms are largely the same as for other tooth problems discussed above.