Any idea on what this actually is, or what I can do to get rid of it? I was sick for a week and thought i had a sore throat, because it hurt to swallow. I check my throat to see if it was swollen or red, and i found a white spot simular to a canker sore/ulcer. I have had it for 3 known days. I have tried to brush and use mouthwash multiple times a day. I have tried to brush the bacteria on the sore but it is too sore to touch. I have tried swishing warm salt water and warm baking soda water. I do not know what else to do because I am in so much pain. It hurts to swallow or eat anything! It just seems to be getting bigger. Any help would be appreciated!