Paraphimosis (say "pair-uh-fy-MOH-suss") is a problem with the skin on your child's penis. The skin that folds over the penis (foreskin) gets tight and sticks behind the head of the penis. If your child can't return the foreskin to its normal place over the head of the penis, this is a medical emergency.
This only happens in someone who still has their foreskin.
This problem needs to be treated right away. If it's not treated, the penis will swell. Blood to the head of the penis may be cut off. This can damage the penis. And it can be very painful.
Your doctor probably reduced the swelling and put the foreskin in its normal place. Your doctor may have done surgery if the problem was severe.
Your doctor may suggest that your child be circumcised. This can prevent the problem from happening again.