Rinse your mouth with warm salt water several times a day
Use a baking soda rinse to reduce irritation
Avoid spicy, acidic, salty, and rough-textured foods
Drink plenty of water to keep your mouth moist
Eat soft, bland foods that are easy to chew
Use an over-the-counter oral gel or mouth ulcer paste
Apply ice chips or cold drinks to soothe pain
Brush gently with a soft-bristled toothbrush
Avoid alcohol-based mouthwashes
Avoid smoking and tobacco products
Take over-the-counter pain relief if needed and safe for you
Manage stress and get enough rest
Check for possible triggers such as sharp teeth, braces, or certain foods
See a dentist or doctor if ulcers last more than two weeks, are very large, or keep coming back