I get canker sores once in a while. In the past I never cared and would smoke as usual, now I try to give it sometime to heal. Sometimes I'll have one during the day, and awake the next morning to find it gone, and I can get up, have a cup of tea and my morning pipe. I never have tried any home remedies as my mother would simply tell me to give it time and avoid overly salty or sweet things. I'll have to give the Arm and Hammer a try.