Hi Vigman,
My son Andrew whos T1 and 11 yrs old, took frequent bouts of chronic diahorrea 3 1/2 yrs ago. about 6months after diagnosis of diabetes, he also begain to lose weight again. During a Hba1c test they sent some bloods of for testing for thyroid and coeliac disease and unfortunately it came back possitive for coeliac disease which is an intolerance to gluten found in wheat, rye, barley and oats. Best get her checked out as in children with diabetes, more are being diagnosed with it, in N Ireland 10 % have both. He also suffered with tummy cramps, wind and smelly stools.
Suzi x