If there is periodontitis, even if the gums are not red and swollen, it is necessary to carry out scraping to remove subgingival plaque and tartar, in order to treat periodontitis, as follows. 1. If the periodontitis lesion is dominated by fibrous proliferation, there may be no redness or swelling of the gums, which is manifested by light or pale gums, tough and hypertrophic texture, gingival sulcus and the inner wall of the periodontal pockets are still inflamed, and there may be bleeding on probing. Periodontitis needs to be treated by periodontal curettage. 2. Periodontal curettage is the use of subgingival curettage to scrape away the tartar and plaque located on the root surface of the periodontal pockets, and at the same time to scrape away the diseased dentin on the root surface, in order to eliminate the bacteria in the pockets, remove the inflammation of the gums, and prevent the progress of attachment loss, so as to achieve the purpose of treating periodontitis. It is recommended to visit a hospital to receive professional treatment.