See your Doc - before I started LC I got really sick and they found out I had a kidney infection. I had maybe 2 days of this minor niggling pain which I ignored and a few days later I was almost in hospital.

Moral of the story - dont mess around when it comes to your kidneys!!

I have no idea if it is related to Atkins, although critics of Atkins say that eating to much protein can cause damage to your kidneys. I personally try to limit my protein consumption for that reason.....