What would be the cause of a bent penis? bad circumcision?

Peyronies/NO!: A "bad circumcision" should not have any effect on the curvature of the penis. You may have a more significant problem with a condition called peyronies disease. This is a thickening of a deeper layer of tissue in the penis. See a urologist and get checked out. Perhaps you can have the "bend" fixed and the "bad circumcision" revised at the same time.

?Congenital?acquired: Number of boys are born with chordee which causes penis o be bent downwards. Some boys have a congenitally deviated penis, usually bent to the left. Others could be victims of a bad circumcision. This can happen with poor technique or if baby boy is born with less or a shortage of skin on the underneath of penis. Removal of an even ring of foreskin can cause penis to be bent downwards.