Types

Minor Aphthous Ulcers

They are small, round or ovoid ulcers measuring 2-4 mm, surrounded by an erythematous edematous tissue. It occurs in groups of only a few ulcers (1-6) at a time. Found mainly on mucosa of the lips, cheeks, floor of the mouth, sulci, or ventrum of the tongue. Heal spontaneously in 7-10 days and have little or no evidence of scarring.

Major Aphthous Ulcers

They are Painful ulcers on non-keratinized oral mucous membrane measuring 1-3 cm.

There is marked tissue destruction . Healing is prolonged often occurs with scarring.

Herpetiform ulcers

These occur in a group of multiple ulcers which are small (1-5 mm) and heal within 7-10 days. They are extremely painful.