Scaling that is periodontal scaling, swollen and painful gums may be caused by gingivitis, periodontitis, periodontal abscess, etc., of which gingivitis and periodontitis can be treated by periodontal scaling, periodontal abscess is not recommended for periodontal scaling, and can be treated with local rinsing, incision and drainage. 1. Gingivitis: Inflammation is usually limited to the free gums and gingival papilla, and the inflammation can be controlled by removing plaque and tartar through periodontal scaling. 2. Periodontitis: Inflammation has led to loss of attachment of periodontal tissues and resorption of alveolar bone, periodontal scaling is the basis for subsequent periodontal scaling, periodontal surgery and other treatments. 3. Periodontal abscess: it is the late stage of periodontitis, in the early stage of abscess before the pus is formed, you can gently remove large pieces of tartar and rinse the periodontal pockets, and when the pus is formed and confined, it will be incised and drained. If periodontal scaling is performed, it may cause bleeding and spread of infection. It is recommended to go to a regular medical institution to receive professional treatment.