Rinse with warm salt water several times a day
Use a baking soda rinse
Avoid spicy, acidic, salty, and very hot foods
Avoid alcohol and tobacco
Brush gently with a soft-bristled toothbrush
Use an alcohol-free mouthwash
Stay hydrated
Suck on ice chips or cold foods to reduce pain
Apply over-the-counter oral ulcer gels or protective pastes
Take over-the-counter pain relievers if needed
Avoid biting or irritating the tongue
Eat soft, bland foods until healed
Manage stress and get enough sleep
See a dentist or doctor if ulcers last more than 2 weeks, keep returning, or are severe
Seek medical care right away if you have fever, trouble swallowing, or swelling