It's hard for me to answer. I assume that the dark spot is pigmentation from trauma. If so, it will go away, faster if you leave it alone, except for vaseline. I think for a definitive answer you will have to show someone. But it's hard for me to imagine a permanent scar from penis enlargement attempts (though I admit I don't really know what a "jelquing exercise" is...)
Best.
Dr. Rockoff
Make sure you see the video on this page. OUCH.
http://www.jelq-usa.com/jelqing/
There is no acne on it, just a balck spot left-off from the jelquing. What should I apply on it to make it heal faster? Should I not apply vaseline?
As far as the small peeled-off sking spots, how should I treat them? (I assume it would be the same as if for a 15 year old that masturbates...aggressively.)
Thanks