Want abs, exercise and good nutrition work well. Want a massage, go to a good, certified massage therapist.
Want to spend lots of money, go to www.fisherwallace.com and get one of their "cranial stimulators".
My wife suffers from chronic pain (in addition to calling me the same thing) and has tried nearly all of the above devices, TENS, EMS, acupuncture, chiropractors, and numerous drugs from her regular doctors.
As a biased observer, I note that the only time she doesn't seem to be in pain is when she is distracted or absorbed in some other activity. Slot machines seem to be effective, especially observing the other players with seemingly similar ailments!
Bottom line, if you THINK it will help your pain, it MIGHT. On the other hand, it might be more of an economic stimulus package than an effective muscle or nerve stimulus.
BTW, is there an APP for this?