Rinse your mouth with warm salt water 3–4 times a day
Use a mild antiseptic mouthwash if needed
Avoid spicy, acidic, salty, and hard foods
Drink plenty of water
Eat soft, cool foods
Brush gently with a soft-bristled toothbrush
Avoid alcohol and tobacco
Use over-the-counter oral ulcer gels or protective pastes
Take pain relief medicine if needed and safe for you
Avoid biting the inside of your mouth
Manage stress and get enough sleep
Check for sharp teeth, braces, or dentures that may irritate the ulcer
See a doctor or dentist if ulcers last more than 2 weeks
See a doctor or dentist if ulcers are frequent, very large, or very painful
Seek medical care if you have fever, trouble swallowing, or weight loss