herpes simplex, mucocutaneous/immunocompetent host
"I used to have canker sore pain for two weeks that was so bad I could not talk or eat without constant pain.  Now, as soon as I feel a sore or more that hurts a lot, I start my treatment of 1 pill per day for 5 days and the pain is reduced to a very tolerable amount.  The pain goes away in a few days altogether.  I only use the pills for the very painful outbreaks. Some sores don't warrant the need to risk unneccessary medicine.  I know when it is time to start medicating when the pain consumes."