Bleeding from the mouth and throat may result from relatively minor issues, such as scratch or infection. However, this can also indicate a more severe condition that requires immediate medical attention. If that is the case, you can go to an emergency dentist to determine where the blood is coming from. Most of the time, bleeding gums are the main reason. It could be caused by gum disease, canker sores, mouth sores, or even forceful brushing or flossing your teeth. In any case, if you cough up blood, it may appear that your throat is bleeding. Keep reading to learn why you might find blood in your mouth and when to see a doctor.