Mouth Ulcers (canker sores)
An ulcer is a breach in the continuity of skin or mucous membrane deeper than the erosion. Ulcers are quite commonly noted in the oral cavity probably because the mucous membrane is a thinner lining than skin. They get easily affected by mechanical, chemical, thermal, electrical and radiation insults. Common ulcers in the mouth are: 1. Traumatic ulcers 2. Aphthous stomatitis 3. Infections 4. Drug-induced 5. Allergy 6. Malignancies