List of 48 causes for Aphthous Ulcer and Vaginal swelling, alternative diagnoses, rare causes, misdiagnoses, patient stories, and much more. Aphthous stomatitis is a common condition characterized by the repeated formation of benign and non-contagious mouth ulcers (aphthae) in otherwise healthy individuals. The informal term canker sores is also used, mainly in North America, although this may also refer to any mouth ulcer. Apr 24, · Recurrent aphthous stomatitis Aphthous Ulcers Treatment & Management. Recurrent aphthous ulcer with well .