One of the most painful types of canker sores you get is a canker sore on the tonsil. Canker sores in the tonsil usually occur as a result of allergy to either foods, or medicines or toothpaste ingredients. Canker sore on tonsil are not contagious and they are not caused by a bacteria or virus. Canker sore on tonsil cannot be healed with traditional medication because they are the result not of disease but of allergy or irritation. Having experience canker sores, help is very important and a great relief to find. There are natural canker sore help that you can use, like natural remedies to help speed the healing and ease the discomfort caused by these painful sores.