Lidoderms for a while now. We had a big thread on Chronic Pain at OBT
about them. Also at MP forum.

They are a water based adhesive..very different from some other patches.

So people often have trouble with them sticking. If you clean the area
first with alcohol and dry it thoroughly, that may help. Also on very curvey areas of the body,
you can cut them into strips and stick them down (sort of like an accordian), and use tape on them. If you perspire alot where they need to go, that is
a problem.

Placement is important too. At least for my MP placement higher up where the
nerve exits the abdomen, that worked best.

For spinal issues, the area where that nerve root exits the spine is often the
best place. I have also used them behind my knee for knee pain. (on the back of my thigh just before the knee bend).