Hi. Are you overweight? If so, this is always one source of potential water retention. I've never heard of any water problems with insulin or most diabetes drugs except the Glitazones which are known to cause water retention. Whilst there are always exceptions, I suspect the water problem is tied-in with your other conditions; but just guessing. You say your BS control is poor? What insulins are you on and what are the control problems? Ref T1.5, probably most diabetics who are overweight are T2 due to insulin resistance, those who are perhaps younger with a normal BMI are more likely to be Late onset T1 (LADA). I'm generalising of course. I refer to myself as T1.5'ish as I've never been overweight and needed high medication early together with a low-carb diet. I'm officially T2 but I know that's wrong as my GP just guessed with no tests. What has your endo said to you?