ROBIN
YOUR SON MAY BE ALLERGIES TO ANYTHING THAT HAVE ACID ON IT. EX: ORANGE JUICE, APPLE JUICE OR SPICES LIKE SPAGHETTI SAUCE. CHOCOLATE IS NOT THE PROBLEM OR COKE EITHER. IT MAY HAVE ORANGE JUICE OR PINEAPPLE JUICE AND WATCH OUT FOR FRUIT LIKE ORANGE OR PINEAPPLE. SOMETIME IF YOU COOK WITH SPICES IT WILL CAUSE THE CANKER SORE. MY SON HAVE THEM ALL THE TIME AND HE LOVE SUNNY DELIGHT AND GATORADE TOO. SO YOU HAVE WATCH HOW MUCH HE DRINKS IT WILL IRRIGATE THEM. HOPE THIS WILL BE VERY HELPFUL. GOOD LUCK