Stomatitis cause deficiencies, which in turn causes stomatitis. Examples include tropical sprue. Aphthous stomatitis (canker sores) is the recurrent appearance of mouth ulcers in otherwise healthy individuals. The cause is not completely understood, but it is thought that the condition represents a T cell mediated immune response which is triggered by a variety of factors. The individual ulcers (aphthae) recur periodically and heal completely, although in the more severe forms new ulcers may appear in other parts of the mouth before the old ones have finished healing. Aphthous stomatitis is one of the most common diseases of the oral mucosa, and
Aphthous stomatitis scarring. The ulceration may affect keratinized mucosal surfaces in addition to non keratinized. Herpetiform ulceration is often extremely painful, and the lesions recur more frequently than minor or major aphthous ulcers. Recurrence may be so frequent that ulceration is virtually continuous. It generally occurs in a slightly older age group than the other subtypes, and females are affected slightly more frequently than males. 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