克隆氏病口腔损害的发生率为6～20%,多见于结肠病和回结肠炎的病人。口腔损害的肉眼观表现如下:(1)阿弗它溃疡(APHTHOUSUICERS)。(2)唇、颊部的弥漫性肿胀。(3)局限于口腔粘膜的炎症性增生和裂伤。(4)后磨牙部位粘膜有坚硬的息肉样损害。(5)有增生性边缘的持续性的深浅状溃疡。(6)下唇中线上有坚硬的裂口。组织学表现:粘膜下和粘膜固有层有淋巴细胞 Crohn’s disease, the incidence of oral damage is 6 to 20%, more common in patients with colitis and colitis back. The macroscopic view of oral lesions is as follows: (1) Aphthous ulcer (APHTHOUSUICERS). (2) diffuse swelling of lips and cheeks. (3) confined to the oral mucosa of inflammatory hyperplasia and laceration. (4) after the molars mucosa hard polypoid lesions. (5) Persistent shades of ulcers with proliferative margins. (6) there is a hard rift in the middle of the lower lip. Histological findings: submucosal and mucosal lamina propria lymphocytes