Mouth sores often go away in 10 to 14 days, even if you don't do anything. They sometimes last up to 6 weeks. The following steps can make you feel better:
- Avoid hot beverages and foods, spicy and salty foods, and citrus.
- Gargle with salt water or cool water.
- Eat fruit-flavored ice pops.
- This is helpful if you have a mouth burn.
- Take pain relievers like acetaminophen.