Does a lump on your testicle necessarily mean a tumour? I have a kind of a swelling but it is there nearly 3 or 4 years.
Most swellings within the scrotum are not malignant. The fact that the swelling you have observed has been present for several years is encouraging since a sinister swelling would have progressed within that time scale. You say that the lump is on the testicle but in my experience most swellings and lumps turn out to be part of the normal anatomy. There are several other structures within the scrotum that are often misidentified as abnormal lumps. You should see your doctor in order to have the swelling properly identified.