@Banana Breath,
True.
My story is that after a bunch of days in San Francisco, walking a lot of up and down streets, I could hardly move my feet one morning. This is years ago, so I forget the details.
Once I got home, I consulted a guy we at the med center liked, newly in business as Orthopedist, and he told me to change shoes. Thus, my adidas, back when there weren't many adidas, and, if I remember, none for women, so I picked the smallest.
That fixed it immediately. Arch support.