Let me first start my saying I have genital herpes for the paSt 20+ years. Since December, I have been getting a red welt on the same spot on my upper lip at random occurrances. It doesn t blister, but it feels warm, throbbing and itchy. It lasts for about an hour, then is gone. I thought that it could be the early stages of a cold sore, but it doesn t turn into that. Also, the perimeter of my lips in general have become itchy at times. Any thoughts about what this can be?