Common question from my patients - "Doc, why do my legs hurt when I walk?". Legs are pretty simple to diagnose - there are essentially five categories of major structures in your legs - bone, nerve, muscle, artery, and veins. Lets describe each one, and what they do, as well as what problems they can cause. 1. Bones make up the skeleton that supports your body - bones can become brittle and break, they can become inflamed and develop bone spurs. And they can rub against each