Question: how do you cure a cold sore in your mouth?
Answer: Use toothpaste and mouthwash that does not contain sodium lauryl sulfate. Another home remedy is to mix milk of magnesia with Benadryl liquid and use as a mouth rinse. You can also dab milk of magnesia directly onto the canker sore with a cotton swab. Rinse your mouth with a salt water or baking soda rinse.