Answer: get that shiit checked out u may have hurpes it could posibly be canker sores if its not on your lips then its porbably not herpes i would try the canker sore medicine that you can find in wal mart if it doesnt help you may want to see a doctor
Answer: It is important to have a proper diagnosis. This includes not only confirming that it is indeed simply a hematoma, but to also determine the cause. It could be something as simple as a self-inflicted bite or it could be a sign of some more serious condition. Have dentist check it out. He may recommend a biopsy which will give you a definitive diagnosis.
Answer: ANSWER: Its called an oral ulceration, or mouth ulcer. It can be from a sharp tooth, biting the tongue, having braces or sometimes can be a bacterial sore. It generally goes away with time and can be aided with an antiseptic mouthwash. See the related link for more information.