What Causes Tingling Sensation In Legs?

Good evening - Since this past Wednesday I have been experiencing tingling in my legs. At first the sensation felt like vibrations. I actually thought the tenant below me in my office was using a jack hammer. Only to discover it was my body that was vibrating. I have never had this symptom before and although I do have a doctors appointment on Monday, I was wondering is there any information you would be able to provide me. Thank you