Once or twice a year, I will drink bourbon with a friend of mine (to excess). On these occasions, I wake to a slightly sore roof of the mouth. Bearable, but uncomfortable. However, I am unable to eat even soft foods because the pain is so great that it makes my eyes water. I can drink cool, non-carbonated liquids - water being the favorite. Everything else is painful. This lasts for three-or-so days and then abates. What is the problem? Is there a way to relieve it more quickly?