Do you have a sperm granuloma (pea sized lump)?
After your vasectomy, one of the tubes that carry sperm (the vas deferens) is cut and sealed to prevent sperm from mixing with semen. Sometimes, a tiny amount of sperm leaks out at the site where the tube was cut. Your body sees these sperm as foreign and forms a small, walled-off area of inflammation around them to contain it.
This is the sperm granuloma—a little lump, usually about the size of a pea, near the vasectomy site.
Most sperm granulomas don’t cause problems and may go away on their own as your body adjusts. You might feel it, but it’s typically not painful. In rare cases, if it grows or causes discomfort, we can treat it with anti-inflammatory medication or, very rarely, a minor procedure.
It’s not dangerous, and it doesn’t mean the vasectomy failed—it’s just your body’s way of handling a small sperm leak.