I think that's probably strep throat
It most likely means you ate something hot, that burned your tongue. I get that a lot, it really hurts. Try not playing with it.
If we are talking about the same thing, my mom always taught me to put milk on them.
The bump, sometimes called a "lie bump", could be anything from a pimple to a cut. Eating sharp foods such as potato chips can cause these. They hurt because your tongue is filled with a great number...
You can rinse your mouth with warm salt water or listerine (other mouth was doesn't work as well).