I have had alot of problems with the skin of my penis. In general I have alot of dry skin problems. about a year ago I was dealing with some kind of infection i got when I would run and sweat. that cleared up after using anti-fungal powder. Then, and still I have a problem with the skin of my penis, though. After an erection the skin on the head looks really dried out, like it has less elasticity. that's not a big deal but the problem is that every time I ejaculate, like the instant it happens the whole top area of my penis (head and softer area near it) become very red and irritated. it happens every time. also If I do not use any kind of lubrication, then for the next day after ward there are one or more "rings" of swollen , light red tissue on the shaft that take almost all day to go away. It's not from any kind of object or lubricant . I don't stray from any standard kind of masturbation. If I use Vasoline it doesn't get swollen afterwards but the head still gets irritated when I ejaculate. I'm starting to get used to it, but if anyone has any suggestions as to what this might be, I would appreciate it. as far as my skin goes, I lost a lot of weight about a year and a half ago and maybe the change in size effected it. not sure. i also am diabetic but haven't had to worry about gulcose levels or take any medication since i lost weight.