A Daring Question

Before I can go ahead and ask a question which I've been dieing to know about, I have a few information of myself.
First of all, I'm currently mid-16 year old boy who is NOT circumcised. I started masturbating since 12 (around 5th grade).
During my 8th grade year, I started to notice my penis got chaffed(I do not know how to explain), reddish around my penis "head." To admit, I used to masturbate hard on the foreskin with the penis head for extreme pleasure and ejaculation. I suppose that's why my penis have been "red" ever since then. Now I still masturbate but once a week or so. (I wonder if that's normal for me) I've tried to apply ointment such as Neosporin and vaseline on my penis after showers, but it doesn't help at all, maybe just calms it down. So my penis head had been reddish on the skin for a year now, and no I didn't have any sexual intercourse or have any STDs or AIDs. If anyone can answer my question diligently, I'd gladly take your advice. Thank you for any help.