What symptoms are associated with cold sores?

Just at ulcer site. Cold sores on the lips or near the lips, are usually caused by recurrent oral herpes virus. They start as a slightly raised reddish area, with a bit of numbness & tingling there. Then comes a cluster of tiny blisters, which break open soon, with some pain; leaving a sore (ulcer) to heal up over a week. Sores appear more often when one is under stress or is ill from another illness.
See below . Go to natdent.Com under info local tenderness with a small “bump” is usually the first sign of a cold sore. This can turn into a blister with increased tenderness. These blisters tend to break and release pus. The adjacent lymph nodes can become swollen and tender.
Tingling & pain sore. There is normally a tingling or itchy prodrome, redness to the area that blistering erupts and weeps fluid and finally crusts over.