Rinse your mouth with warm salt water several times during the day
Rinse with a baking soda solution to reduce irritation
Apply a topical oral gel or ointment for mouth ulcers
Use an antiseptic mouthwash if suitable for you
Avoid spicy, acidic, salty, and very hot foods
Eat soft, cool foods only
Drink plenty of water
Avoid alcohol and tobacco
Do not touch, bite, or irritate the ulcer
Take an over-the-counter pain reliever if you can safely use it
Use a cold compress or ice chips to numb the area
Brush gently with a soft-bristled toothbrush
Avoid toothpaste with strong whitening agents or sodium lauryl sulfate
Get medical or dental help if the ulcer is severe, very large, or does not improve