There are different reasons why one testicle may appear bigger than the other. If one of your testicles is slightly bigger than the other, don’t panic, this is completely normal for most men and boys.

Most people with a penis have two testicles in their scrotum — but some only have one. This is known as monorchism. Monorchism can be the result of several things. Some people are simply born with ...

Your left testicle is actually more vulnerable to certain health issues than your right, so sometimes, you’ll only feel pain on one side. There are a range of causes, and some require a doctor’s visit ...