口腔溃疡又称阿怫他目疮（aphtha），是一种常见病多发病，治疗方法很多[1]，但均难令人满意。而雷尼替丁与西米替丁是治疗消化性溃疡的有效药物。且雷尼替丁在疗效上优于西米替丁[2]，笔者从中得到启示，将两者外敷治疗口腔溃疡80例（治疗组），同时用西瓜霜治疗口腔溃疡34例 Oral ulcer, also known as Aphtha Acne Eye (aphtha), is a common and frequently-occurring disease, a lot of treatment [1], but are difficult to satisfactory. And ranitidine and cimetidine are effective drugs for the treatment of peptic ulcer. And ranitidine curative effect is superior to cimetidine [2], I get enlightenment, the two external application of 80 cases of oral ulcer (treatment group), while the treatment of oral ulcer with watermelon cream in 34 cases