During pregnancy, changes in hormone levels during pregnancy can cause gingival hypertrophy and other conditions that predispose to gingivitis and cause bleeding gums, especially after brushing, a common symptom during late pregnancy. Gingivitis is also a common cause of gum hypertrophy, so how is gum hypertrophy caused by gingivitis diagnosed? The following is the diagnosis of gingivitis resulting in gingival hypertrophy: 1. Gingivitis and inflammatory hyperplasia: unclean gingivitis, tartar and inflammatory gingival hyperplasia are common causes of gingivitis. Often bleeding occurs when brushing, biting hard food, flossing or other stimuli, and generally stop on their own. Treatment: first of all, the cause should be removed, such as the disease because of the stimulation of tartar, must be scaling, such as food embedding, then need to correct food embedding, such as bad restorations, should be removed. 2, necrotizing gingivitis: a mixed infection of Clostridium perfringens and oral spirochetes. The main manifestations are ulceration of interdental papillae, necrosis, putrefaction, pain and gingival bleeding. Treatment, the first change to improve oral hygiene, local use of 3% hydrogen peroxide solution rinse, in addition to giving vitamin C, if necessary, antibiotics. 3, gingivitis and gestational tumors during pregnancy: during pregnancy, gingival congestion, edema, easy to bleed when touched. 4 months later, gestational tumors tend to occur on the gingival papillae, tumor-like hyperplasia, easy to bleed when touched. Oral hygiene should be maintained. Pregnancy gingivitis can mostly heal spontaneously after delivery, and pregnancy tumors can shrink or stop growing after the pregnancy period, or gingival tumor removal can be performed after delivery.