@Xaborus - herpes has nothing to do with the topic of this thread. Herpes ulcers are quite different from canker sores.
Earlier this week I visited the dentist and was told that my gums are inflamed, most likely due to a dry mouth which is probably due to the fact that I usually sleep with my mouth open. To fight the dry mouth, my dentist suggest I use a mouthwash such as Biotene. Apparently Biotene may also help fight against canker sores, so I'll see how it works out.
Ah, okay. Sorry its just been drilled into my head from school. In school we are pretty much brainwashed into becoming paranoid of STD/STI's.
Biotene is great stuff, but gets quite expensive. Have you tried using a waterpick and rinsing with saltwater? You will be blown away at the difference in oral health with a waterpick.