In reflexology theory, there is what is known as a zonal relationship between the body and the foot. There are ten vertical or longitudinal zones in the body that correspond to our ten toes. There are also horizontal zones on the foot corresponding to the shoulder and diaphragm areas, the waistline, and the pelvic area below it. Using zone theory, we are able to determine where on the foot the solutions to most of our aches and pains can be found.