Instead of applying the Lidoderms to the breast itself, apply them
over that side of the back from the spine. Shingles pain radiates from the ganglia along the spinal column and I think Lidoderms work best
not at the point where pain is perceived, but blocking the nerves as they
enter the spinal cord.
from http://www.emedicine.com/plastic/topic113.htm

This would be about the area between the shoulder blade and the spine on that side. Try putting your patch there.

I have never had success with Lidoderms placed over the perceived pain area, but always have success with interrupting the nerve anatomically.
I wish doctors understood this concept as well.