现代医学认为复发性口疮属自身免疫性疾病,与内分泌紊乱、胃肠功能障碍、病毒感染、局部刺激等有关。常迁延复发难愈。祖国医学认为大多数复发性口疮均属虚证。阴虚多见于气虚,而阴虚中肺肾阴虚居多,次之为心脾阴虚。前者方用生地、玄参、麦冬、沙参、玉竹、知母、黄柏,后者方用生地、白芍、当归、淡竹叶、甘草,或绿豆鸡蛋改。若为中气不足之口疮,可兼见舌胖齿痕,方用参芪、白术、甘草、扁豆、山药。对气 Modern medicine that recurrent aphthous is an autoimmune disease, and endocrine disorders, gastrointestinal dysfunction, viral infection, local irritation and so on. Often delayed recurrence and recovery. Motherland medicine believes that most of the recurrent aphthous ulcers are empty card. Yin is more common in qi deficiency, and yin deficiency in the majority of lung and kidney yin, followed by heart and spleen yin deficiency. The former side with habitat, Scrophulariaceae, Radix, Radix, Polygonatum, Anemarrhena, Phellodendron, the latter with habitat, white peony root, Angelica, light bamboo leaves, licorice, or mung bean eggs change. If the lack of gas in the mouth sores, tongue-fat tongue can be seen on the tongue, side with Shen Qi, Atractylodes, licorice, lentils, yams. On the gas