It is mostly and odd noise. Once I had a tingly sensation on my right leg (the one I turn and drag if low on dopamine) It started in the mid back of my calf muscles and would stay there for seconds, then move down a couple inches.(it kind-of felt like very low current electric impulses) When it got to my heal, it started back up in the same manor (but a couple inches over on the calf ) until it reached about the starting level again...then it was done. It never happened again. This happened after I started taking my fava tincture. My friend said it sounded like a blockage in a meridian. After it happened, my leg was less restless.