How can i tell if i'm having a cold sore outbreak?

Cold sore: For people who do develop signs and symptoms, a cold sore usually passes through several stages, which include: tingling and itching. Many people feel an itching, burning or tingling sensation around their lips for a day or two before cold sore blisters erupt. Blisters. Small fluid-filled blisters typically break out along the border where the outside edge of the lips meets the skin of the face.