A dental abscess is a localized infection in the mouth that occurs when bacteria invade the tooth or surrounding gum tissue. This infection can lead to the formation of pus, causing swelling, pain, and discomfort. It often results from untreated tooth decay, gum disease, or a dental injury. Symptoms of a dental abscess may include severe toothache, swelling in the face or gums, and a bad taste in the mouth. If left untreated, the infection can spread to other areas, leading to more serious health issues. Prompt treatment by a dentist is essential to prevent complications.