Before tackling the topic of canker sore home remedies let’s first of all clearly define the difference between canker sores and cold sores: “canker sores are painful ulcers, or open sores, on the inner membranes of the mouth and cheek, or can resemble pimples on the tongue. Canker sores are not considered to be contagious and are of uncertain origin. Cold sores, on the other hand, are small red blisters that generally affect the mouth and facial areas, but usually appear on the lip and outer edge of the mouth. In contrast to canker sores, cold sores are extremely contagious … Read more