For most people, mouth ulcers will clear up within 2 weeks. A mouth ulcer is a small, painful lesion that forms inside the mouth. They can appear as round or oval sores with a white, yellow ...
Cold sores are a lesion that can appear on and around the mouth. While they aren't dangerous, they can be uncomfortable, itchy, and unsightly. Cold sores usually resolve themselves within a few ...
You may also notice bumps on the back of your tongue, sores that appear on the side, or a white coating. COVID can also sometimes cause loss of papillae, which makes your tongue look smooth.