I am 26, and have had the following in order:
Night 1 : slight fever
Night 2: heavy fever, fever blisters
Night 3: heavy fever, canker sore, whole mouth becomes extremely sensitive around gum line
I can barely eat, it is so painful to eat anything that isn't as soft as a fried egg. I have dipped snuff for 5 years but I don't have any "lumps or lesions" in my mouth. I am hungry but loose all appetite after a few painful bites