A dental abscess is a localized collection of pus caused by a bacterial infection associated with a tooth. There are several types of dental abscesses, including periapical abscesses at the tip of the root, gingival abscesses involving the gum tissue, and periodontal abscesses involving the bone near the tooth. Symptoms include severe toothache, swelling, fever, and pain when tapping or biting on the tooth. Treatment involves draining the abscess through root canal treatment, incision and drainage, or tooth extraction depending on the prognosis of the tooth and patient preferences. Leaving an abscess untreated can damage surrounding structures and potentially lead to tooth loss.