 Aphthous @-@ like ulceration may occur in association with several systemic disorders ( see table ) . These ulcers are clinically and histopathologically identical to the lesions of aphthous stomatitis , but this type of oral ulceration is not considered to be true aphthous stomatitis by some sources . Some of these conditions may cause ulceration on other mucosal surfaces in addition to the mouth such as the conjunctiva or the genital mucous membranes . Resolution of the systemic condition often leads to decreased frequency and severity of the oral ulceration . 
