hi my son is nearly 10yrs old an he has one testical bigger than the other is it normal at hes age.
Go to the doctor is the best option.
DOnt be embarrised, for a doctor, your just another guy with one testicle larger than the other, no big deal to them.
Could be cancer, but most likely it isnt, so dont get to worried about it, just make sure you get it checked by a doctor.