Question: how long does it take for cold sore scab to fall off?
Answer: Typically, these blisters will burst, resulting in an open and painful sore. A scab then forms over the wound. Once the scab falls off and the skin heals, the cold sore is no longer contagious. The entire process usually takes around 7–12 days, though the cold sores may last for up to 15 days.