After wearing dental crowns, the gums are considered to be infected gums, mainly anti-infective treatment, local puncture or incision and drainage treatment, if necessary, consider removing the crowns. 1. Anti-infective treatment: after wearing crowns, the gums may be infected due to suppurative gingivitis, should be applied under the guidance of the doctor antibiotic anti-inflammatory drugs, such as cefixime, metronidazole and so on. 2. Local puncture or incision and drainage treatment: If the gingival pouch has not been able to eliminate, the doctor can carry out local puncture or incision of the abscess for drainage, and special liquid for local rinsing, disinfection and so on. 3. Root canal treatment: If the pulp is infected due to apical periodontitis before the crown is put on, leading to gum puckering, the infected pulp should be removed, root canal treatment should be carried out, and the cavity should be closed. 4. Removal of crowns: If discomfort is caused by wearing crowns, resulting in recurrent pustules on the gums, the removal of crowns should be considered. Therefore, if the gums after wearing a crown, it is recommended to go to the regular hospital dental consultation and examination, timely and professional dentist to take appropriate measures.