Were you having sex (like in your other post
http://www.medhelp.org/posts/show/486373?post_id=post_2747618) or masturbating (as in this one)? If you were bleeding during intercourse and did not use a condom, I would also be concerned about that.
Regardless, only a doctor can tell you if you require treatment or surgery by actually seeing the injury. I wouldn't mess around with this--you should go to the doctor ASAP. And if you don't need surgery, you should rule out the possibility of infection. Also, if this happened during unprotected sex, some other tests may be in order--also mention that to your doctor.