Hi i was wondering if anyone knows if it is usual for gfr to fluctuate. My gfr readings for the last three months went from 51 to 48 to 33. They then went back up to 43. Having them done again this week as doctor concerned due to previous history with liver. Have been fluctuating for long time before this too. Not under nephrology and havent had scan. Blood pressure been going up so meds increased. Was also asked when had scan on liver four years ago whether anyone had ever told me my kidneys were small, whatever that means.