Start antiviral treatment as soon as tingling or burning begins
Use docosanol 10% cream at the first sign of symptoms
Ask a doctor about prescription antivirals such as valacyclovir, acyclovir, or famciclovir
Apply a cold compress for 5 to 10 minutes at a time to reduce pain and swelling
Keep the sore clean and dry
Use petroleum jelly or lip balm to prevent cracking
Take over-the-counter pain relievers such as ibuprofen or acetaminophen if needed
Avoid picking, popping, or touching the sore
Wash hands after any contact with the sore
Avoid kissing, oral sex, and sharing cups, utensils, towels, or lip products
Avoid acidic, salty, or spicy foods if they irritate the sore
Get enough rest and reduce stress
Stay hydrated
See a doctor if sores are severe, frequent, spreading, or not improving
Seek urgent care if you have eye symptoms, a weakened immune system, or trouble eating or drinking