If you have an abscess, your wound or infection site has become contaminated and serves as a breeding ground for bacteria. When left untreated, these bacteria can lead to severe complications and life-threatening diseases such as sepsis. That’s why it’s essential to regularly check on wounds and ensure that they’re not infected before they burst and release potentially harmful contents into your body. Periapical abscess: Bacteria enter the tooth through tiny holes produced by tooth decay or caries. Caries destroys the softer dentine tissue beneath the enamel over time. Without effective treatment, the decay will eventually penetrate the soft pulp tissue of the tooth. The pulp is composed of nerves, connective tissue, and blood vessels. As the pulpitis advances, the bacteria travels to the alveolar bone, surrounding and protecting the tooth. As a result, the periapical abscess is formed. Periodontal abscess: Periodontitis occurs when plaque contains bacteria that infects the gums. Inflammation of the gums leads to the separation of the root from the base of the tooth. When the periodontal ligament separates from the root, a tiny gap known as a periodontal pocket develops. The pocket is difficult to keep clean because it gets dirty easily. A periodontal abscess forms as bacteria accumulate in the periodontal pocket. Gingival abscess: The buildup of bacteria in the tissues between teeth and gums causes a gum abscess. Gum abscesses are more prevalent among individuals who have poor dental hygiene. Chronic periodontitis, or gum disease, can develop as a result of poor oral care Typically, a foreign object that causes the gingival abscess, such as a popcorn hull or toothbrush bristle, gets trapped in your gums.