Does the canker sore medicine "Abbreva" work for you?

NO. Abreva only works for cold sores which are VIRAL infections and are located on skin that is attached to bone (gums, roof of the mouth. Canker sores are BACTERIAL or AUTOIMMUNE infections and are located on skin that is unattached to the bone (cheek, lips, tongue). It's important that you use the right medication for the right kind of sore.