 Recurrent oral ulceration associated with systemic conditions is termed " RAS type ulceration " , " RAS like ulceration " , or " aphthous @-@ like ulcers " . Aphthous stomatitis occurs in individuals with no associated systemic disease . Persons with certain systemic diseases may be prone to oral ulceration , but this is secondary to the underlying medical condition ( see the systemic disease section ) . This kind of ulceration is considered by some to be separate from true aphthous stomatitis . However , this definition is not strictly applied . For example , many sources refer to oral ulceration caused by anemia and / or nutritional deficiencies as aphthous stomatitis , and some also consider Behçet 's disease to be a variant . 
