牙龈是口腔粘膜色素沉着的主要部位,多见于前牙区,发病无年龄和性别上的明显差异,其产生原因繁杂,缺乏有效治疗方法。虽然目前口腔粘膜色素沉着与肿瘤等的关系尚不明确,但有时严重影响美观及导致病人的“恐癌”心理产生。 Gums are the main parts of oral mucosa pigmentation, more common in the anterior teeth area, the incidence of age and gender were not significantly different, its causes are complicated, the lack of effective treatment. Although the relationship between oral mucosal pigmentation and tumors is not yet clear, it sometimes seriously affects the appearance and lead to the patient's “fear of cancer” psychology.