The viral season is upon us and so is stress. There are many stress-related viruses that can rear their ugly heads. What can we do naturally to attack these viruses at their core or ward them off? There are ancient methods that have been used for centuries. Some of the common ones are canker sores and cold sores. More than anything, canker sores and cold sores are annoying. What are they? What causes them? How can you avoid them? What can you do to promote healing? Canker sores are inside your mouth and can be caused by one of several things.