Swelling of the flesh between the tooth and the tooth can be caused by apical abscess, periodontal abscess or gingival hyperplasia. 1. Apical abscess: An apical abscess is usually caused by inflammation of the tissues around the root tip of the tooth, and may be accompanied by overflow of pus, which may affect sleeping and eating. Root canal treatment is usually required. 2. Periodontal abscess: Periodontal abscess is a suppurative inflammation that occurs in the walls of the periodontal pockets or deep periodontal tissues, and is usually caused by microorganisms in the plaque that cause chronic infections. It can cause patients to experience symptoms such as swollen and reddened gums. If not actively treated, it will recur. 3. Gingival hyperplasia: Swelling of the flesh between the teeth and the teeth may also be caused by gingival hyperplasia, which does not cause pain. It may be caused by poor oral hygiene or a misaligned bite. The flesh between the teeth and the teeth is swollen without pain may also be caused by other factors, it is recommended that patients go to the hospital in a timely manner to identify the cause of the symptomatic treatment.