The patches are really large.

I have found cutting them leaves plenty of action, and saves alot of money! The large size is basically for the back (shingles).
I cut them almost always now. 1/2 patch is plenty for one knee for example.

They are one of the few types of patches that you CAN cut up safely. On the curvy back I have cut them in strips like an accordian,
and taped them down, to keep them in place. (when I had that terrible tendon injury, I was desperate and learned some useful
tricks while in the boonies with only Lidoderm and Tylenol.)

If they do not feel cold to the touch when you take the backing off, then if you lightly spritz with water (very lightly) wait a few minutes, they will rehydrate,
and work better.

I really only have problems on sweaty spots (in humid weather) or friction areas.

I really like mine. I think they solve many problems.

Sue, I thought the patches you said your mother was using were Salonpas?
I don't recall giving Lidoderm advice. (but maybe I did).