The causes of right leg pain are very many, commonly caused by the following conditions. First, if the local trauma caused by soft tissue injury, ligament rupture, meniscus injury, fracture, dislocation, may cause right leg pain. Second, if there is osteoarthritis of the knee joint, meniscus damage or femoral head necrosis in the right leg, it will also cause right leg pain. Third, if there is lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, when the compression of the spinal nerve roots, will also cause right leg pain. Fourth, if there is pear-shaped muscle syndrome or sciatic neuritis on the right side, it will also cause painful symptoms in the right leg.