A soft, painless swelling of the scrotum, hydrocele is due to a build-up of excess fluid in the sheath surrounding the testes. It may be precipitated by injury, and is common in older men, although in most cases the cause is unknown. The condition may be congenital. The swelling may be caused by inflammation, infection, or, very occasionally, a tumor. Usually hydrocele is just monitored, but fluid may need to be drained off should the swelling become too great.


If symptoms persist beyond a month, see a doctor.

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