Hi there fellow fasters!
A week ago I water fasted for a bit more than a week and I am Water Fasting again for 7 days. At day 4 I started having severe back pain, it's right in the middle of my back, on the left side. I had the exact same problem on the previous week water fast!!! Oh also, the back pain stopped soon after I started eating again..
I don't have any known back problems, I am worried it might be the kidneys?? Any insight welcome! :)