Also known as:
A hydrocele (say “HY-druh-seel”) is a buildup of watery fluid around one or both testicles. It causes the scrotum or groin area to swell.
A congenital hydrocele is one that a baby is born with. Hydroceles can also occur later in life for a number of reasons. This topic is about congenital hydroceles, which are found in about 1 or 2 out of 100 male newborns.1
The swelling from a hydrocele may look scary, but it is usually not a problem. It will probably go away by the time your baby is 2 years old.