After eating a main course I felt the roof of my mouth swollen.  I had not this obstruction before commencing the meal.  My mouth then filled with blood and there was quite a lot before it cleared.  Traces of blood remained for several days.  An ulcer in this area required antibiotics to heal it. What would have been the cause of this loss of large amount of blood?
Thanks for your query, I have gone through your query. The swelling in the palate or roof of the mouth could be because of the trauma caused by the food particles, or it can be because of the burn caused by a hot food or Chat Doctor.  These two reasons might have resulted in the formation of ulcer.  You can take topical anesthetic and analgesic like Anabel gel. The other possible cause of the swelling could be secondary to tooth or gum infection. Consult an oral physician and get it ruled out. You can take a radiograph to rule out infection in the tooth. If there is infection in the tooth, Meanwhile you can take a course of antibiotics like amoxicillin 500 mg and metronidazole 400 mg TID for 5 days (if you are not allergic). I hope my answer will help you, take care.