What's causing your leg pain and what can be done to alleviate the pain? Here are some of the causes and treatments to bring you relief. Pain In The Lower Leg Flat feet, pronated feet (collapsed arches), high arches and leg length discrepancy are some biomechanical factors that can contribute to pain in the knees and legs. When the feet are not centred and weight is borne unevenly, forces are concentrated on focal areas. Sudden increases in activity, weight gain and overuse f