Eat lukewarm or cold foods. Hot food can irritate soreness. Puree foods before you eat them. Most cooked foods can be pureed in a blender or food processor. Avoid carbonated beverages or drink them only after they have gone flat.
Carbonation can irritate soreness.
Drink soups or other liquids from a straw or a cup instead of a spoon to keep foods away from sore spots in your mouth. Talk with your doctor about using an anesthetic mouthwash to help relieve discomfort. Have your doctor examine your mouth to see whether you have a fungal infection. Such infections are treatable and often occur in patients who are ill, especially those taking steroids or antibiotics. Avoid rough foods that may be hard to swallow, such as hard breads, toast, popcorn, raw vegetables, nuts, and seeds.