One nerve of my penis gets rough and rigid when I masturbate. During past one week I masturbated two times and both the time it got rough and rigid may be it is cause of jerking method. May be or may be not. I tried jerking method 7 to 8 times, it is not much time. I quit it cause I have no time for that. After some days of quitting jerking when I masturbated one nerve of my penis got rough and rigid and caused a little pain during evacuation. Now I fear that the nerve can be burst or cause some problem. So what should I do to get rid of this problem? Can the nerve be burst or can it cause of some problem? Or can it heal itself after sometime? So what should I do to get rid of it?