Gum hypertrophy is one of the common symptoms in dentistry. Some people have frequently swollen and bleeding gums, often found in the morning or at night while brushing their teeth. There are many causes of gingival hypertrophy, and many diseases can cause gingival hypertrophy. The following are the specific causes of gingival hypertrophy. 1, fibrous hyperplasia When suffering from this disease, gingival hypertrophy, gingival hyperplasia occurs in severe cases, and may even cover the teeth. The large, hard, painless fibrous hyperplasia tissue wrapped around the surface of the teeth can interfere with tooth eruption, causing lip protrusion and chewing difficulties. 2, Leukemia Gingival hypertrophy is a common early manifestation of leukemia. Especially in acute monocytic, lymphocytic or granulocytic leukemia. It often manifests as localized swelling or with necrosis. The tender gums become blue, shiny, and bleed easily. 3.Vitamin C deficiency (scurvy) In this case, the gums are soft and edematous, spongy, and the gingival papillae appear red or purple. The gums are prone to bleeding and swelling. Oral examination reveals cyst-like gums between sparse teeth that are filled with blood clots. Other symptoms include loss of appetite, pallor, dry mouth, scaly dermatitis, fatigue, drowsiness, insomnia, and signs of abnormal bleeding. 4. Other etiologies Medications. The anticonvulsant phenytoin sodium often causes gingival hypertrophy. Cyclosporine, a drug used to prevent rejection of organ transplants, has caused gingival swelling in about 15% of patients after administration.