Noun
aphthous stomatitis (uncountable)
(pathology) The condition of having aphthous ulcers.
It may be used for severe inflammatory conditions of the oral mucosa such as the severe forms of aphthous stomatitis. Source: Internet
It is sometimes use for herpetiforme ulceration (an uncommon type of aphthous stomatitis), but prolonged use may lead to oral candidiasis as the fungal population of the mouth overgrows in the absence of enough competing bacteria. Source: Internet