Compeed Discreet Cold Sore Healing Patch contains hydrocolloid active gel technology for fast healing and a reduction in scabbing. It starts to work from the very first sign and continues throughout all stages. The patch is having discreet design which helps to protect the cold sore and help avoid social embarrassment. Compeed Cold Sore Patches also acts like a virus shield to help reduce risk of contamination from the cold sore and to prevent it from worsening. COMPEED® Cold Sore Discreet Healing hydrocolloid patch works from the inside out to help the body’s natural healing process. It's Hydrocolloid-075 active gel technology creates the optimal germ-free healing environment to help prevent the scab forming and the cold sore from spreading. The patch stays in place for up to 12 hours. 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.