Hello, I woke up this morning with a green tongue. When i went to the bathroom, my stool was also a shade of green. I haven t eaten anything with green food coloring, or any green leafs that could have made my stool green. I ve been fasting for the past month, so I m not sure that has anything to do. I have no pain, I m just curious as to what could have caused this. The only different thing I had yesterday were some prunes. Could that be the cause?