They really do work! Relieve your foot pain with Dr. Foot's Arch Support Insoles for Flat Foot! There is little to do about this kind of severe pain - it's hard to not put any weight on the flat foot. The pain remains even when you are sleeping. After about a week of wearing these in my shoes, at all times, I am having substantially less pain. I'm not being awakened up out of my sleep with pain lately. This is big news.