Causes of testicle lumps and swellings
Lumps and swellings in the testicles can have lots of different causes.
Most are caused by something harmless, such as a build-up of fluid (cyst) or swollen veins in the testicles (varicocele).
But sometimes they can be a sign of something serious, such as testicular cancer.
Don't try to self-diagnose the cause of your lump – always see a GP.