Sir Ulcers can be due to multiple reasons. Until it's seen to us, it's difficult to identify what has caused the ulcer. Basically if it's a Cheek bite, then we will have to figure out the tooth hurting it and creating it,.. if it's stress induced, then we can help you with some medicine, if it's because of stomach upset, then again medicine would help. Being very Frank, ulcers don't heal very quickly. They take some extra time. All I can say is that apply some topical ointment on your ulcer like Anabel gel. That would help you reduce pain. Kindly visit a dentist for a check up so that you're completely comfortable. Hope this helps