Canker Sores: How It Works, Explained Simply

Video Transcript

A canker sore is a small ulcer that forms inside the mouth. It often shows up as a small round spot with a pale center. Stress, a minor injury, or certain foods can trigger one. Unlike cold sores, they form inside the mouth and are not contagious. Most canker sores heal on their own within a week or two. Gentle care and avoiding irritating foods can ease them. The result is usually a full recovery without treatment. This video is for general education only. It is not medical or dental advice. Ask your dentist what's right for you.