Yeah, now I understand!! You place your patches at this two areas to be sure you hit the nerve.
Luckily I got a nerve block from an anesthesist two weeks ago. He searched for the exact place with ultrasonic and than injected lidocain. There's still a little red point on my hip from this injection. So... when I place my patch over this little red point - I think I'll hit excactly the nerve, don't I?:-)
btw thanks for your general lidoderm advice. Luckily I have very dry skin so the patch sticks like glue.
Sadly my insurance doesn't pay for the patches. But when you are in pain you pay nearly every amount for relieve...