Major Ulcers: Larger, deeper, and more painful sores that take longer to heal and may scar. - Herpetiform Ulcers: Tiny, ...

RAU is classified as minor, major, and herpetiform on the basis of ulcer size and number. The cause of RAU is idiopathic in most patients. The most likely precipitating factors are local trauma ...

2 Herpetiform ulceration, a rare subtype of aphthous ulcer, presents with 5–100 tiny, grouped, or scattered aphthous lesions in the absence of HSV.3 This may occur in patients with Behçet disease, ...

Major mouth ulcers, on the other hand, can have a diameter of three centimetres and are extremely painful. They take several weeks to heal and often leave scarring. A third type, herpetiform mouth ...