how long is cold sores on your lip contagious for?
A person will most often get a cold sore or fever blister on his lip. People can also get cold sores on their nostrils, chin and fingers. A cold sore lasts from 7 to 10 days.
Usually, there is no scarring and the cold sores go through this whole process in about seven to 10 days, although some may persist as long as two or three weeks. The time from infection to the development of symptoms (incubation period) ranges from two to 12 days for cold sores.