Yo bros, Im 27 days out of my cycle and Im currently runnig Letro to try and reverse sum minor gyno. Over the last couple of days, I've been having sum soreness in my back around the middle of my left side, and a little on my right. Could this just be sore joints due to the fact that the letro is sucking out all the estrogen, or is this kidney pain? I have never read of anyone experiencing kidney pain from letro, so i wanted to see if anyone has experienced this while on letro. This is my 6 day on letro, and Im at 1mg today and want to keep increasing the dose possibly up to 2.5 but dont want to f**k my kidneys up. Any input would be appreciated...