I didn't have much to say the first time, and the additional information you provide now doesn't help me add much. I think Englishman's comment on your first post is a good one. If your skin is sensitive, lubricate it and minimize friction, to the extent you can. You cannot permanently damage skin from an encounter, however rigorous.....
Dr. Rockoff
Ever had blisters (filled with clear fluid) on your feet because of new shoes? Ever had them on your hand because of gardening without gloves? No STD shows up immediately after. You have this irritation because you are jerking too hard without any lube. Sort it out.
Penile skin takes longer to fully heal. Leave it alone for a bit and give your old fella a chance to recover.