A very prolific inventor is trying to solve the 600 Billion dollar problem;  namely  chronic pain.  This article is a fascinating read.

http://www.washingtonpost.com/news/inspired-life/wp/2015/07/27/the-genius-inventor-who-says-hell-eliminate-chronic-pain-with-a-simple-device/

Magnetism and the human body have always interested the curious.  Electricity and magnetism are certainly areas where we do not have all the answers.  This inventor is trying to use a magnetic pulse to short circuit the pain pathways.  He has already succeeded for migraines. In 2000, the three inventors filed an application for a patent. It detailed a portable device that presses against the skull and shoots magnetic energy into the brain, expunging a migraine before it starts. One study published in Neurology called such technology a “major step forward” in chronic migraine treatment.

Imagine if he could succeed on back pain?  Perhaps I would be out of job.