So with the diagnosis of Sciatica, the two tests that help us the most are the non-invasive arterial studies and the MRI. If your arterial studies would show arterial blockage are positive, then you’ll need to see a vascular surgeon. But don’t be worried. Not everybody needs surgery and there are many medical treatments for it. For causes that we see on MRI, such as Lumbar stenosis, the bony overgrowth, which squeezes the nerves, or a ruptured disc, or other things that squeezed the nerves, many times, conservative treatment can help before one has to go to surgery.