Peripheral nerve stimulation (PNS) has evolved from technology associated with spinal cord stimulation (SCS). The concept of PNS is similar to utilization of SCS; however, the electrical leads are placed near the peripheral nerve as opposed to inside the epidural space. If a specific peripheral nerve is targeted, the term PNS applies. However, if an area of pain is targeted, such as treatment of axial back pain, the reference term peripheral nerve field stimulation (PNFS) is used. There are two basic types of electrical stimulation leads a cylindrical lead, which can be placed percutaneously and a relatively large paddle lead, which requires an incision to be made in the skin. Peripheral nerve field stimulation has been used as a treatment for postherpetic neuralgia (PHN).