My frenelum(banjo string) was ruptured fully during masturbate. I somehow pull down forcefully. At the time alot of blood coming out. I used soframycin over it after cleaning it with warm water and tie a cloth around it. But after 2 days again lots of blood was coming out. And one more thing when my frenulum ruptured i heard a pop sound too. But never felt a pain. I have dark black line around my penis, whats it mean. Should i go to doctor. I have upload a pics of a black coloured ring around my penis.