Common Causes And Risk Factors For Canker Sores

Canker sores are painful, round ulcers that form inside the mouth, on the inside of cheeks or lips, and along the tongue and gums. They are usually yellow or white lesions in the center with a vivid red border. Most individuals will have one to three canker sores at a time, but some suffer from more severe infections with up to a dozen lesions spread around the mouth at once. Canker sores are sore and annoying, but luckily they usually go away on their own. They are most commonly seen in children and teens between ten and twenty, but recurring cold sores frequently occur once you've had others.