Rinse with warm salt water several times a day
Avoid spicy, acidic, salty, and crunchy foods
Use a soft-bristled toothbrush
Keep the mouth clean and brush gently
Apply an over-the-counter oral gel or ointment
Use a mouth rinse for mouth sores if recommended
Suck on ice chips or drink cold water
Stay hydrated
Avoid alcohol and tobacco
Eat soft, bland foods
Take over-the-counter pain relief if needed and safe for you
Avoid touching or picking at the sore
See a dentist or doctor if it lasts more than 2 weeks, is very painful, keeps coming back, or is accompanied by fever, swelling, or trouble eating or drinking