Urethroplasty
An incision (cut) is made in the penis and the narrowed part of the urethra (the tube that carries urine to the outside of your body) is removed and the urethra rejoined.
In balloon urethroplasty, a thin tube with a balloon attached is inserted into the opening of the penis. When it reaches the narrowed part of the urethra, the balloon is inflated, thus widening the urethra.