Understand your oral ulcer symptoms with Buoy, including 9 causes and common questions concerning your oral ulcer. Soothe painful mouth ulcers naturally with simple home remedies like saltwater, honey, and coconut oil. Quick relief, easy to try at home. In this blog, we’ll explore everything you need to know about mouth ulcers, from causes and symptoms to treatment options and prevention tips. What Are Mouth Ulcers? Mouth ulcers are small, painful, open sores or lesions that develop on the soft tissues inside the mouth. 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.