How would you be able to apply the different tips on how to get rid of cold sores when you don’t know much or, worse, anything about them in the first place?One of the common misconceptions is that cold sores and canker sores are the same. They’re not, though they may look alike. First, canker sores are caused by bacteria, while cold sores are of virus called herpes labialis. Moreover, canker sores can occur only inside the mouth. Though cold sores can also erupt around the mouth, they may also be found in your cheeks as well as in the nostrils.