I think I can relate to the pain you are wxperiencing in your low back. I have something that sounds similar. For me it feels more like it is "pinching" and causing numbness. It could be your low back is out of place and pinching the siatic nerve. this can be very painful.

Try laying on your back, pull one leg up to make like a 4 then pull legs upward keeping ankle of one leg on thigh of other, and pull bottom leg towards chest....do this with both legs, this might help relieve some of the pain.

You mentioned something about a metalic tase.....did u mention that to the doctor? That isn't normal.

I had a wart similar to what u are describing, they never spread, and were kinda painful. If to me a treatment by the doctor followed by home treatments to get rid of it, it was ugly too. It itched REALLY BAD! I remember that because it was on my finger and I tried to keep it covered because it was so gross, but it itched alot.

Well let us know how things are.

Dar