I have normal brown coulered stools however when I wipe my bottom it's yellow, I have been diagnosed with Graves dieasese and an overactive thyroid my levels were very high and are now in range a few years ago I was diagnosed with IBS, I am really worried now as I have had this problem for ages, I've had blood tests ect to check my liver and other stuff but nothing has been picked up, does anyone have any ideas? I also having GERD symptoms. Is this all to do with having been so overactive?