A tooth abscess is a painful condition that occurs when a pocket of pus forms in the tooth or surrounding gums due to infection. This infection can result from untreated cavities, gum disease, or dental trauma. Symptoms often include severe toothache, swelling, and sensitivity to hot or cold. Treatment for a tooth abscess typically involves draining the pus and addressing the underlying infection, often with antibiotics. In some cases, a dentist may need to perform a root canal or extract the affected tooth to prevent the spread of infection and relieve pain.