On thyroiduk.org.uk/tuk/about_... one of the symptoms mentioned is protein in urine. I had that last year and the doctor thought I had had some kind of infection that caused it. I had no symptoms. It went away after about 3 months. Because I have diabetes type 1 it is checked once a year because kidney failure is one of probable diabetes complications. To get a better understanding of all factors, can someone explain how hypothyroidism can lead to protein in urine?