Joint, Back Pain Traced To Flat Feet During Childhood July 6, 2011 5:00 PM SOURCE: CHICAGO (CBS) — Your aching back, knee-problems and chronic hip pain may trace back to when you were a kid. Turns out, having flat feet during adolescence can create much bigger health problems later in life. CBS 2’s Mary Kay Kleist introduces us to a young patient who’s taking a big step now to avoid more pain down the road. Ten-year-old Sydney Richards is walking a little easier these days. …