Gingival enlargement after kidney transplantation is recommended to be seen by a stomatologist or periodontist. This phenomenon may be related to oral cyclosporine medication after kidney transplantation, which is one of the adverse drug reactions.
Clean oral hygiene and treatment such as scaling may make some mild cases better. If the gum enlargement is severe, you may also want to talk to the treating doctor who performed the kidney transplant about the possibility of changing the medication and stopping it.