Hi
I have similar symptoms - when I roll back foreskin tight I also notice the skin i sweating - the rim of my knob gets red ( as does inner foreskin) after sex or masturbation...not sore,,,spots appear moreso after stimulation...knob gets dry looking, and a bit rough texture when air dried....I will go see dermo and see what verdict is - will post response
good luck
Not sure, although it certainly doesn't sound like an STD. It probably isn't a bite (how would a bug get there?) More than likely, it's a form of eczema. Try leaving it alone and applying 1% hydrocortisone twice a day. If it persists for a week or so, show a doctor.
Best.
Dr. Rockoff