If the gums in the innermost part of the mouth are red, swollen and painful, systemic anti-inflammatory treatment can be given first, and oral cephalosporin antibiotics plus metronidazole drugs are recommended. At present, the commonly used cephalosporins are cefixime, cefixime, cefazolin sodium, etc., and the metronidazole drugs are metronidazole and tinidazole, etc. Then brush your teeth well. It is recommended to use the pasteurized brushing method recommended by the Chinese Dental Association to brush the food residue and soft scale in the gum sulcus between the neck of the teeth and the gums. If you still cannot solve the problem of swollen and painful gums, it is recommended to visit the stomatology department of a regular hospital or the oral and maxillofacial surgery department of a large hospital as soon as possible. Let the doctor conduct a detailed clinical examination to see to what extent the gums are red, swollen and painful, and whether a periodontal abscess has formed. If an abscess is formed, an abscess incision and drainage will be required. If an abscess does not form, the inflammation of the gums can be controlled by repeatedly rinsing the gum sulcus with hydrogen peroxide or saline, or the blind pocket in the most distal pericoronal area.