 People with Crohn's often also have issues with small bowel bacterial overgrowth syndrome, which has similar symptoms.Recurrent aphthous ulcers are common, however it is not clear whether this is due to Crohn’s disease or simply that they are common in the general population.Other findings may include diffuse or nodular swelling of the mouth, a cobblestone appearance inside the mouth, granulomatous ulcers, or pyostomatitis vegetans.