It sounds like a mouth ulcer aka canker sore inside your mouth.
If you are concerned that your "pimple" was more than a pimple, see your provider to see if it's actually a boil or something similar.
grace
a mouth ulcer what is that and how do you get it? It really hurts when I eat or put pressure up against it..what about my throat feeling sore and hurting only on the right side..if it was a sore throat wouldnt my whole throat hurt when i swallow?
a boil what is that all about..is it something i should worry about> well it looked like a large pimple with a couple days full of pus now its just a pimple that got smaller but its still there and doesnt go away. does a boil do that.
also do you think this mouth ulcer is because of herpes?
can u help me answer these questions