Aphthous stomatitis the lesions, the healing time of individual ulcers and whether a scar is left after healing (see below). This is the most common type of aphthous stomatitis, accounting for about 80–85% of all cases. This subtype is termed minor aphthous ulceration (MiAU), or minor recurrent aphthous stomatitis (MiRAS). The lesions themselves may be referred to as minor aphthae or minor aphthous ulcers. These lesions are generally less than 10 mm in diameter (usually about 2–3 mm), and affect non-keratinized mucosal surfaces (i.e. the labial and buccal mucosa, lateral borders of the tongue and the floor of the mouth). Usually several
Aphthous stomatitis 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. The vast majority of people with aphthous stomatitis have minor symptoms and do not require any specific therapy. The pain is often tolerable with simple dietary modification during an episode of ulceration such as avoiding