What Is a Dental Abscess?
A dental abscess is an infection. When it happens to a tooth, it will be at the root of the tooth or between the gum and the tooth. When your body detects an infection, it sends white blood cells to the area. These white blood cells collect the infected tissue and all of the germs and turn everything into a liquid called pus. The pus builds up and makes the area swollen and painful.
An abscess on your gum is called a periodontal abscess. It is an infection in the space between the gum and your tooth. This occurs next to a living tooth, and is a sign of periodontal disease. ...