Mouth ulcers: A mouth ulcer is a painful

A mouth ulcer is a painful and typically small lesion that develops in the mouth. Discover causes, how it compares to a cold sore, prevention tips, and more. A mouth ulcer is a break in the oral mucosa that may be caused by trauma, infection, medication, or disease. Learn about the different types of mouth ulcers, how to distinguish them from other lesions, and how to treat them. Mouth ulcers are usually small, painful sores or lesions that develop on the soft lining of the mouth. Anyone can get mouth ulcers and they are usually harmless. Read this article to learn about mouth ulcer symptoms, causes, and treatment. Don't delay a proper diagnosis, or you could be causing more harm than good.