Cold sores usually appear on the lips and outer edges of the mouth. Occasionally they may occur on the chin, nostrils, or fingers. The first symptom of a cold sore is pain or tingling on the area of infection. This is often called the prodrome and usually precedes the appearance of blisters by one to two days. Then small, painful, fluid-filled blisters will form on the skin. They usually break open, weep clear fluid, then crust over and heal without leaving a scar. The normal stage of healing is 7-10 days.
Other symptoms that may be accompanied with a cold sore:
Swollen lymph nodes in the neck