What is an aphthous ulcer?

An aphthous ulcer, commonly known as a canker sore, is indeed characterized as a recurrent sore that occurs inside the mouth. These ulcers are typically small, painful lesions that develop on the mucous membranes, including the inside of the cheeks, lips, or the base of the gums. They are usually round or oval with a white or yellow center and a red halo around them.

The exact cause of aphthous ulcers is not fully understood, but they may be triggered by factors such as stress, hormonal changes, food sensitivities, or minor injuries to the mouth. They are not caused by viral or bacterial infections, which differentiates them from cold sores or other lesions in the oral cavity. Canker sores can be painful and may interfere with eating, drinking, and speaking, making their identification important for proper management.

Understanding the nature of these ulcers is essential for appropriate diagnostic and treatment approaches, making awareness of their symptoms and manifestations critical in clinical practice.