Rinse your mouth with warm salt water several times a day
Use a baking soda rinse to help reduce irritation
Avoid spicy, acidic, salty, or crunchy foods
Choose soft, bland foods
Drink plenty of water
Use a soft-bristled toothbrush
Avoid toothpaste with sodium lauryl sulfate if it irritates your mouth
Apply an over-the-counter oral gel or protective paste
Use a mouth rinse recommended for mouth sores
Avoid picking at or irritating the sore
Suck on ice chips or cold treats to numb pain
Take over-the-counter pain relievers if needed and safe for you
Reduce stress and get enough rest
See a dentist or doctor if the sore is large, very painful, lasts more than 2 weeks, or keeps coming back