Periodontal abscesses are often manifested by the appearance of pus on the surface of the gums, which is the most prominent symptom. According to the development process, the abscess is substantial and tough in the early stage, slowly the abscess develops and matures, there may be a sense of fluctuation on the surface, and some people will have a surface rupture, and the surface of the abscess becomes softer. When you go to the hospital for abscess drainage, a light scratch on the surface with a pointed object will bring out pus, including pus and blood, which is the main and most common symptom of periodontal abscess. Periodontal abscess will be accompanied by pain, compared with apical inflammation caused by periapical abscess pain is not so intense, relatively speaking is also relatively limited to the surface of the periodontal tissue, is not very deep in. The presence of an abscess inside the mouth has to be differentiated from an abscess caused by apical inflammation. If the abscess is a periodontal abscess, it should be treated according to the cause of the periodontal abscess; if it is a periapical abscess caused by apical inflammation, it needs to be treated with appropriate endodontic treatment.