Phimosis is an inability to retract the foreskin (skin covering the tip of the penis) behind the tip of the penis. Paraphimosis is the inability to reduce the foreskin back to a resting position after it has been retracted. Either of these circumstances can warrant a circumcision or a dorsal slit procedure.
Circumcision is an outpatient surgical procedure done under general anesthesia. The foreskin is removed from the penis.