There are many reasons why the flesh above the tooth is swollen, such as alveolar bone hyperplasia, periodontal abscess, chronic apical inflammation and so on. 1. Alveolar bone hyperplasia: Bony bumps in the maxillary bone can cause alveolar bone hyperplasia, which leads to the phenomenon of a swollen bag on the top of the tooth, which is usually hard, and does not affect the daily life and diet. 2. Periodontal abscess: periodontitis can gradually form a periodontal abscess, resulting in the phenomenon of a swollen bag on top of the teeth, the texture of the swollen bag is softer, but also accompanied by local redness and swelling of the gums, congestion, the need for timely incision and drainage. 3. Chronic apical inflammation: chronic apical inflammation is due to pulpitis after a long time, not thoroughly treated, can cause apical inflammation to form abscesses, abscesses in the gums position rupture, there will be teeth above the meat of a swollen bag phenomenon. The reason for the swelling of a bag of flesh above the tooth is many, after the emergence of symptoms in a timely manner to the hospital, after a clear diagnosis to give standardized treatment, do not ignore the symptoms, so as not to delay the treatment of the condition.