Question: how do you treat a cold sore in your mouth?
Answer: avoid hot, spicy, salty, citrus-based, and high-sugar foods.
avoid tobacco and alcohol.
gargle with salt water.
eat ice, ice pops, sherbet, or other cold foods.
take a pain medication, such as acetaminophen (Tylenol)
avoid squeezing or picking at the sores or blisters.