pimple thingon my tongue

Do you ever get this weird little pimple on your tongue sometimes? Well i do all the time and it is so annoying and it kinda hurts. Well i have one right now and so does my dad. Its so weird. I hate it. The worst thing is i don't know why its there. The reason its there. I wish i knew so i could stop it. Maybe its from something i ate. Or maybe some sugar that i ate. I don't know but its so annoying.