Skin diseases A – C Skin diseases A-Z Canker Sores April 10, 2024 / August 12, 2026 by Dick van Gerwen | Leave a Comment Symptoms Painful sores in the mouth. White or yellowish spots with a red border. Difficulty eating or drinking due to pain. Irritation or a burning sensation in the mouth. Canker sores can vary in size, from small to larger than a centimeter. They usually heal on their own within one to two weeks but can […] Read more » Canker sore treatment Canker sores Canker sores on cheek Canker sores on tongue Mouth irritation Mouth sores Oral mucositis Painful mouth ulcers Recurrent canker sores White ulcers in mouth