What distinguishes minor from major Apthous ulcers?

Minor apthous ulcers are characterized by their smaller size, typically less than 1 cm in diameter, and they usually heal within one to two weeks without scarring. In contrast, major apthous ulcers are larger, often exceeding 1 cm, and can take several weeks to heal, potentially leading to scarring. The significant difference in size and healing time is key to differentiating between the two types of ulcers.

The color of the ulcers can be similar, as both minor and major apthous ulcers present with a gray or whitish necrotic center and a surrounding red halo. Location can vary, but both types can occur in similar areas within the mouth, such as the inside of the cheeks, gums, or tongue. The presence of infection is generally not associated with apthous ulcers, as they are not caused by viral or bacterial infections, but rather are thought to be related to factors such as stress, hormonal changes, or certain dietary deficiencies.