The flesh on the last side of the big teeth is red, swollen and painful Consider gingivitis, periodontal abscess, wisdom tooth pericoronitis, apical periodontitis can be treated by general treatment, medication, and other measures. 1. Gingivitis: (1) General treatment: pay attention to oral hygiene, rinse the mouth with light salt water, avoid taking stimulating and spicy food, as well as too cold, too spicy, too acidic, too hard ingredients. (2) Periodontal scaling in time. 2. Periodontal abscess: In addition to anti-infective treatment with drugs such as metronidazole and cefixime, pus secretions can also be discharged through incision and drainage. 3. Wisdom tooth pericoronitis: If it is caused by wisdom tooth pericoronitis, it is recommended to go to the regular hospital to remove the wisdom tooth and remove the triggering factors. 4. Periapical inflammation: Periapical inflammation requires root canal treatment. The flesh on the last side of the big teeth is red, swollen and painful, it is recommended to go to the hospital for examination and treatment under the guidance of the doctor. Medications should be used as prescribed by the doctor.