I am undiagnosed at present (normal bloods!) but have been having hypo symptoms. I am being tested for all sorts at the moment, most recently serum cortisol which came back slightly on the low side. As a result I have been asked to do a 24hr urine test and I was getting concerned that the container is almost full already so went to my friend Google! It seems normal output is 400 - 2000ml in 24 hours, I'm over that already in 8 hours! It seems that one cause could be diabetes insipidus which can be caused by hypothalamic/pituitary problems. As my TSH is normal but FT4 is low I've been looking at secondary hypo but gp has said no, yet things keep seeming to point that way. Does anyone else have similar issues? And before anyone asks, no I don't drink excessively, if anything I don't drink enough!
Thanks for reading!