Rinse with warm salt water several times a day
Use a baking soda rinse
Avoid spicy, acidic, salty, or crunchy foods
Use an over-the-counter oral numbing gel
Apply a protective oral paste or patch
Take over-the-counter pain relievers if needed
Use a soft-bristled toothbrush
Avoid alcohol-based mouthwashes
Stay hydrated
Reduce stress
Get enough sleep
Avoid biting the sore area
See a dentist or doctor if it lasts more than two weeks, is very large, or keeps coming back