[header] How to use abreva [title] Use the medication as soon as you start experiencing symptoms. [step] Early signs of a coming cold sore include pain, burning, or feeling the blister emerging. [substeps] Abreva is made for use on your face or around your lips, but you can also use it around your nostrils if your cold sores have extended there. 
Don't apply it inside your nose or mouth. If a small amount gets into your mouth, such as cream that you licked off your lips after application, there is no need to worry.