Compeed® Cold Sore treatment is the first discreet healing patch for cold sores. Up to 12 hours non-stop action from Day 1 - to heal fast. Each discreet patch creates an optimal healing environmental and stays in place for up to 12 hours* *Individual experiences may vary. In a clinical study involving 174 subjects 25% of the subjects had a wear time of 12 hours or more. Acts like a virus shield** **The patch acts like a virus shield to reduce risk of contamination from the cold sore. Hides Cold Sore Makeup or Lipstick can be applied over the patch. For best results start using when you first feel a tingle and continue using a patch day and night throughout the outbreak until the lesion is fully healed.