Every once in awhile, I develop what look like small "cuts" around the top of the base of my penis, in a straight line. They hurt a little bit, but not too extreme. They are purple/red in color. They aren't specifically cuts, like you wouldn't be able to stick anything between it (i don't think)...they go away and reappear...I've had them maybe 4 or 5 times. What could these be? Herpes? Or am I thinking out of the box??