Use an antiviral medicine as prescribed by a doctor
Start treatment as early as possible
Rinse with warm salt water
Use an alcohol-free mouth rinse
Avoid spicy, acidic, salty, or hot foods
Eat soft, cool foods
Drink plenty of water
Use ice chips or cold drinks to reduce pain
Take over-the-counter pain relievers if safe for you
Apply a topical oral pain gel if recommended by a pharmacist or doctor
Keep the mouth clean with gentle brushing
Avoid touching the sore
Avoid kissing and oral contact until healed
Do not share cups, utensils, or towels
Get medical care if the sore is severe, lasts more than 2 weeks, or keeps coming back