a shallow erosion with a yellow-white center surrounded by a narrow, red ring

A painful sore in the mouth or throat; also called canker sores.

a small often painful shallow lesion on the mucous membranes lining the mouth, esophagus or rectum. Recurrent aphthous ulcers (RAU) reappear frequently and are refractory to treatment.

A painful oral or esophageal sore of unknown cause that has a deep eroded base. Aphthous ulcers are common in persons living with HIV and are treated with corticosteroids. Thalidomide -- a drug used in Europe as a sedative before it was discovered that it caused birth defects -- is an experimental, alternate therapy.

a painful mouth or esophageal sore of unknown cause that has a deep eroded base. Aphthous ulcers are common in people with HIV but may also be associated with certain drugs. These are often treated with corticosteriods.

a blister on the mucous membranes of the lips or mouth or gastrointestinal tract find all NHC pages containing: aphthous ulcer

An aphthous ulcer or canker sore is a type of mouth ulcer which presents as a painful open sore inside the mouth caused by a break in the mucous membrane. The condition is also called aphthous stomatitis, also known as "Sutton's Disease", especially if there are multiple or recurring mouth ulcers.