Thank you...it's reassuring that the pain is excruciating. But, if it's not a torsion, then could it be cancer? Like I said this pain has come and gone for about 2 years now. First it was mainly on the left side, now it's almost always on the right. I'll have lower back pain, abdominal pain, and the groin pain. I can't tell if the testicle itself has grown at all, but it doesn't feel abnormal at all - even the doctor said so. Could this be testicular cancer if it's not a torsion?