Some medications can cause gingival hyperplasia, such as phenytoin sodium for epilepsy, and gingival hyperplasia after long-term use, a condition collectively known as medicated gingival hyperplasia. It is mostly seen in the elderly, who need medication to regulate their bodies because they are old and have many diseases. It is not expected that certain medications can cause enlarged gums and hyperplasia. This hyperplasia will disappear automatically after stopping the medication. In addition, lack of vitamin C can also cause gingival hyperplasia. Preventive measures: 1. Pay attention to oral hygiene and develop the good habit of “brushing your teeth in the morning and evening and rinsing your mouth after meals”. 2, regular oral examination, especially emphasize the pre-pregnancy examination, follow the medical advice, early detection, early diagnosis, early treatment, timely treatment of oral diseases. 3, orthodontic treatment before adolescence, before pregnancy and early pregnancy should be timely treatment of the original chronic gingivitis, strict control of plaque, can greatly reduce the occurrence of adolescent gingivitis and gingivitis during pregnancy. 4, for those who need to take long-term phenytoin sodium, cyclosporine and calcium channel blockers and other drugs, oral examination should be conducted before starting the medication to eliminate all the stimulating factors that may cause gingivitis, and teach patients the method of controlling plaque to maintain oral hygiene. 5, active treatment of the original gingivitis can reduce the occurrence of drug-related gingival hyperplasia.