Herpecin-L® Pain Relief with Lidocaine is the first triple action spot treatment that instantly numbs cold sore and fever blister pain & itch, protects against infection, and helps prevent cracking. With maximum strength lidocaine, Herpecin-L® Pain Relief targets and numbs cold sore pain & itch right at the source and starts working on contact, with no burning or irritation. A soothing skin protectant helps prevent painful cracking and re-opening while keeping the cold sore moisturized, and maximum strength antiseptic helps keep the cold sore from getting infected.