In the most common form, length-dependent peripheral neuropathy, pain and parasthesia appears symmetrically and generally at the terminals of the longest nerves, which are in the lower legs and feet. Sensory symptoms generally develop before motor symptoms such as weakness. Length-dependent peripheral neuropathy symptoms make a slow ascent of leg, while symptoms may never appear in the upper limbs; if they do, it will be around the time that leg symptoms reach the knee.  When the nerves of the autonomic nervous system are affected, symptoms may include constipation, dry mouth, difficulty urinating, and dizziness when standing . 
How it works: A spinal cord stimulator system generates mild electrical pulses and sends them to your spinal cord via implanted leads that are attached to the generator, which is normally implanted just above the buttocks. The electrical pulses, when received by the spinal cord, replace the feeling of pain with a tingling or massaging sensation, thus reducing or eliminating the patient¹s pain. The patient can control the level of stimulation using any of the multiple custom programs that he or she sets up with the physician. Patients can have a stimulation program for when they are working, standing, sitting, sleeping, etc., based on their levels of pain during these normal activities.