The main concern with that would be if you are getting rid of more water that way than you can drink.If you still pee enough and your blood work is OK (you might get your electrolytes checked out sometime) it may not be a big problem.You just don't want to get overly-dehydrated.I would talk to the doctor that this is they only way it comes out, especially if you haven't had your pelvic floor tested to make sure it can actually relax enough to pass a even somewhat more solid stool.K.