Five years ago, I got my penis burnt by hot water, when i was taking shower.

Now, when i masturbate, tip of my penis gets little wounded. Is it that my skin down there has become soft, or its just that i'm overdoing. My frequency is two to three times a week. And it so happens sometimes that i masturbate twice within a day.  Does the burnt skin become more succeptible to bruises? 

What should i do. I am a bit conservative and don't want to see a doctor. Any person knows, how to get rid of it. Can it be cured or damage is permanent.