It just suddenly appeared the other day. No pain, swelling, build-up, nothing. Just woke up Tuesday morning to some pain and swelling, then yesterday is seemed like it was better until the evening when the pain really took off. I have been rinsing it with hydrogen peroxide and it helps a bit (there was a puss pocket in the back that isn't there anymore). The biggest problem now (other than the pain that is giving me a serious headache) is that I can't open my mouth wide enough to get most food in...and when I do get food in, I can't chew it! When my parents get back from camping, I think I'm going to ask them for help (they already offered, but I was kind of hoping it'd go away on its own).