Wearing a crown of swollen gums is generally the occurrence of gingivitis, the cause may be poorly designed restorations, the treatment is to take anti-inflammatory drugs to assist in controlling inflammation, followed by the elimination or reduction of the causative factors, as follows. 1. Anti-inflammatory drugs, such as metronidazole, tinidazole, etc., can be taken to relieve the symptoms of inflammation and stop its continued development. Drugs should be used under medical supervision. 2. If gingivitis occurs due to poor axial profile of the restoration, excessive length of the crown margin, poor polishing of the crown margin, overhanging or stepping of the restoration margin, etc., the restoration should be dismantled and redesigned and remade. It is recommended to visit a regular medical institution for professional treatment with the help of a doctor.