复发性口疮,为农村常见的口腔粘膜溃疡,多发生在口唇、颊粘膜、舌及上腭等处。初为小疱,迅即破溃,逐渐增大,如小米或黄豆大小,稍凹陷,外绕以红色晕圈,表面复盖灰黄色污秽膜。自觉口干,疼痛,说话及咀嚼时疼痛加剧,十分痛苦。有的病人,从幼年起反复发作,时溃时愈,此起彼伏,连绵不 Recurrent aphthous, common oral mucosal ulcer in rural areas, occur in the lips, buccal mucosa, tongue and upper palate. The beginning of a small blisters, and soon rupture, gradually increased, such as millet or soy size, slightly depressed, outside the red halo to cover the surface covered with gray-yellow foul film. Conscious dry mouth, pain, speaking and chewing pain intensified, very painful. Some patients, from infancy recurrent, when the collapse of the more, one after another, endless