Could a TENs stimulator help my chronic low back pain?

A recent review of studies available, indicates that transcutaneous electrical nerve stimulation (TENS), may provide immediate decrease in pain intensity. However, there was no evidence that TENS can improve short-term or long-term pain or perceived disability for chronic low back pain.

S. Poitras and L. Brosseau. Evidence-informed management of chronic low back pain with transcutaneous electrical nerve stimulation, interferential current, electrical muscle stimulation, ultrasound, and thermotherapy. The Spine Journal. January/February 2008. Volume 8. Issue 1. Pp. 226-233.