Tongue care: tips on preventing canker sores / geographic tongue?

2 different problems. Geographic tongue is a physical trait and there isn't anything you can do about it. Like having freckles or moles. Canker sores are caused by the herpes simplex virus from childhood chicken pox. Reducing trauma and stress are the only remedy. If you can figure out how to eliminate stress from your live tell all of the rest of us and become rich and famous.