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>> once i found warren's campaign, here's a place i can feel like i'm making aid difference. >> reporter: how many hours a week do you think you spend trying to elect elizabeth warren? >> me? probably more than most people. probably 12 or 14 hours a week just doing different things. >> reporter: the warren campaign started building an iowa operation before any of its rivals with eight field offices open and more to come. the campaign has held organizing events in all 99 counties. >> is there a chance you and your wife might be interested in helping us out? >> reporter: volunteers made calls fo...

That's it. >> reporter: she says it lasts around 9 months. but not all doctors think messing with your feet is a good idea. >> though i don't have anything inherently against cosmetic surgery, no problem if someone wants to change their nose or boobs, but you don't walk on your boobs. >> reporter: still, many women won't be swayed. jennifer is no longer longer embarrassed by her sweat stained shoes. >> once it kicked in. i notice aid difference. >> reporter: and a week after her treatment, she is pain free. >> i feel like not so frightened by my shoes anymore. because i love them. i look forwa...