the bumps on your tong is called your taste buds it helps you taste all sorts of different foods without them you would never taste anything in your life.that is my answer unless you are talking about somthing else.
You probably have bitten a part of your tongue, and for a few hours or days it creates a bump, something like a mosquito bite. Just put ice on it, if it hurts, it wil numb it
You probably have...