How can i stop a canker sore before it happens?

May not be able to : We do not understand the exact cause of canker sores but they are related to stress , trauma and possibly vitamin deficiency, especially bs.. Here is some relationship to allergies, sensitivity to cinnamon and sls. Some of these things are under your control but not everything.

You can't: No one knows what causes canker sores. They may be caused by a virus, allergy or auto-immune condition. Use of cleansing antiseptic medications may prevent infection, reduce discomfort and promote healing.