The main symptom of a hydrocele is swelling in the scrotum. Generally,  hydroceles do not cause pain; however, adult men may feel discomfort

There are two types:

Noncommunicating hydrocele happens when the sac closes like normal, but the boy’s body doesn’t absorb the fluid inside it.

Communicating hydrocele happens when the sac doesn’t seal. With this type, his scrotum may swell more over time.

Try an Epsom salt bath. If you notice a painless swelling in your testicle(s)/scrotum, take a very warm bath with at least a few cups of Epsom salt added. Relax in the tub for between  15 – 20 minutes with your legs slightly spread, so that the water engulfs your scrotum. The warmth of the water can stimulate the movement of body fluids (it may help unblock a blockage) and the salt can pull fluid out through your skin and reduce swelling. Epsom salt is also a rich source of magnesium, which helps to relax muscles / tendons and soothe any tenderness.

If there is pain associated with your hydrocele, then exposing your scrotum to warm water (or any source of heat) may create more inflammation and make your symptoms worse.

Don’t make the bath too hot (to prevent scalding) and don’t sit in the tub for too long (to prevent dehydration).