Is It Normal for One Testicle to Be Bigger Than the Other One?

Read Transcript

Dr. Oz, is it normal for one of my testicles to be a little bit bigger than the other? Testicle size is asymmetry. We're really not very symmetrical. Women have different size breasts, guys often will have different size testicles, tiny bit a difference, but not a big one. So that's OK, and remember they're supposed to be asymmetrical.

Do we know the word avocado comes from the Aztec word for testes? It's that shape, and one's lower than the other, and they grow in pairs. So, generally the left testicle is a little bit larger, and a little bit lower, so they don't bang into each other, and so most folks ought to focus not on what their size is today, but whether there is a change in their size.

So if it gets larger, either one, by your observation you might have an infection in there, but you also could have a cyst usually benign, or even a tumor. And if it's a tumor, that of course is something that's serious. It's a major cause of cancer in young men especially, so you have to examine yourself.

Do it regularly, easy to do, palpate it, it should be about the size of a walnut. Easy way to tell the difference if it's not that.