"Nahom", a 6 year 9 month old female Chihuahua, came for a checkup with symptoms of "tooth root abscess." Tooth root abscess can occur in dogs and cats with oral problems such as tooth decay and a lot of tartar, which allows germs to accumulate at the tooth root, causing abscess to form. Tooth root abscess is treated by tooth extraction and tartar scaling. Dr. Mednun, DVM, Phawinee Montien, Ultrasound Department, Dentistry Department, Internal Medicine Department.