After a person is infected with the herpes simplex virus, cold sores can occur repeatedly. The sores often weep a clear fluid and form scabs after a few days. A cold sore typically lasts 8 to 10 days and is contagious until the blister is completely crusted over.
Cold sores usually heal on their own. Medicines are available for more rapid healing, reducing pain, and reducing the severity of future outbreaks.
eMedicineHealth Medical Reference from Healthwise
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