Cold sores, also known as fever blisters and Herpes labialis, are very common. When they occur, usually appear as groups of blisters in patches. And once they pop, they can form scabs lasting several days. These spread by close contact such as k1ss1ng and are caused by HSV-1 and less commonly by HSV-2. They can be contagious even if you don’t see the sores. Signs and symptoms vary, depending on whether this is your first outbreak or a recurrence. Recurrences typically appear at the same spot eac