A hydrocele occurs when the scrotum fills with fluid and becomes heavy. A hydrocele occurs in males when fluid fills the scrotum, which is the sac under the penis that contains the testicles. Fluid can surround one or both testicles, causing swelling in the scrotum.
A man experiencing hydrocele may feel like there is a small balloon filled with fluid inside his scrotum. It is smooth, painless and may vary in size. Very large.
Older boys and adult men can develop a hydrocele due to inflammation or injury Pain generally increases with the size of the inflammation.
Hydroceles vary greatly in size. Very large hydroceles are sometimes seen in elderly men who have never shown their swelling to a doctor.