Well, there are numerous problems that we see in association with wearing high heel shoes, including excess pressures on the forefoot, that's the ball of the foot, that you abnormally load when your foot is in a elevated position at the heel. Not only can that cause problems with pain under the ball of the foot, but it can lead to premature arthritis due to abnormally loading specific joints, especially that involving the first toe, which you can tell when you wear a high heel shoe, bends back excessively. And this bending backwards of the big toe can rub down the cartilage prematurely on the top of the joint, which is where joint arthritis in the big toe generally tends to occur first. And that can lead to bone spurring, loss of the cartilage, and eventually a need for intervention.