White Bumps in Mouth?

They are usually called oral ulcers, and the word ‘blisters’ is usually used only in connection with only type of ulcer ‘ ‘fever blisters’, more accurately known as herpes labialis. Fever blisters are also commonly known as cold sores, but they have nothing to do with fever or the cold. They are simply the result of a viral infection by the herpes simplex virus.