Scott,
I think the severity and duration of these sores varies from person to person. Some people are more sensitive to the radiation and as a result, the reaction is more severe. My sores started at the end of the first week and lasted for about a month after radiation treatments ended.

Chuck is right about keeping on top of the rinses. Plus you should make sure that your pain medications are sufficiently strong to minimize the discomfort. I found a very dilute solution of warm water and baking soda to be helpful between the Lydocain swishes.

Good luck with your treatments - Sheldon