Pabb- To get an idea of where on your legs this is happening, take a hair brush, and move it gently over your legs to determine where the sensation is different. By using something other than your hand, you eliminate tactile feeback that you get when using your hand.

Once you have an idea where things are different, do a search on "Dermatome map" and it will show you where on your skin the different lumbar levels (L1, L2, etc.) are tied to those areas.

The following step might be to have your doc request an EMG or Nerve conduction study to find out which nerves are affected.

Good luck.

joe