The most recent welt looked and felt as if someone had scratched the head of my penis with their
fingernail. For several hours post-sex, the head of my penis was also fairly sensitive. This sensitivity went away after a few hours, and the red spots and lesions a day or two later. However, later in the week, these red dots and the outline of the most recent "welt" reappeared after masturbating.
I've done as much research on my own as one can do...