Earlier quoted context omitted.
The magnetic fields from those items don't produce much force, so you need a small thing on sensitive skin to notice the effect. A bracelet is probably too heavy to notice fields that don't also come with a "warning: strong magnetic field" sign.
I mean I guess I was thinking of something to amplify the effect, probably with a small battery in it. All the sated curiosity with none of the questionable body modification :-P
Sadly, you can't beat the physics with today's magnets. Magnetic monopoles are still sci-fi, so the strength of a magnetic field over distance falls of with an inverse cube law; the field strength is proportional to 1 / (distance ^ 3).
For the same reason, electromagnets need to use an enormous amount of power to be effective over long distances.
That's why people get these magnets implanted; because they sit right against the nerve, and the distance is on the order of nanometers. Hurts like heck to get it in, though.