Apply an over-the-counter antiviral cream such as docosanol as soon as tingling starts
Use a cold compress for 5 to 10 minutes at a time to reduce pain and swelling
Keep the sore clean and dry
Apply petroleum jelly or lip balm to prevent cracking and bleeding
Take over-the-counter pain relievers like ibuprofen or acetaminophen if needed
Avoid touching, picking, or popping the sore
Wash your hands after any contact with the sore
Avoid kissing and sharing drinks, utensils, towels, or lip products
Use sunscreen or lip balm with SPF to help prevent worsening from sun exposure
Get plenty of rest and stay hydrated
Avoid acidic, salty, or spicy foods if they irritate the sore
Start prescription antiviral medication early if you have frequent or severe outbreaks
See a doctor if the sore is near the eye, lasts more than 2 weeks, or you have a weakened immune system