This is a small mouth sore that's a big pain. Canker sores are open sores that have a white or yellowish coating and are usually about ¼ of an inch across. You might find them on the inside of your ...

Persistent canker sores can be associated with several medical conditions like celiac disease, inflammatory bowel diseases like Crohn’s disease and ulcerative colitis, Behcet’s disease ...

Drinking through a straw can help. Scraping the sore can make it hurt worse. You might need some medicine to dull the pain. Your mom or dad can ask your doctor about which one is best for you. If your ...