Cold sores and angular cheilitis can look somewhat similar, but they’re two different conditions. Learn more.

Canker sores from Crohn’s might at first appear similar to other mouth lesions like cold sores, and they can both be painful. But cold sores have a different cause — herpes simplex virus type ...

Canker sores are painful ulcers that occur in the mouth, including on gums. Here's a look at how to deal with them.

Ulcerative colitis can affect more than just your gastrointestinal tract — it can affect your skin, too. Learn about symptoms and treatments for better skin health.