Rinse with warm salt water several times a day
Use a baking soda rinse
Avoid spicy, acidic, salty, or rough foods
Use a soft-bristled toothbrush
Avoid alcohol-based mouthwash
Apply over-the-counter oral numbing gel
Use protective oral paste or gel on the sore
Take over-the-counter pain relievers if needed
Stay hydrated
Suck on ice chips or cold foods
Avoid picking or irritating the sore
Manage stress and get enough sleep
Check for triggers like certain foods, toothpastes, or mouth injuries
See a dentist or doctor if sores are severe, frequent, last more than 2 weeks, or come with fever or trouble eating or drinking