I have just had a blood test and am wondering if my thyroxin should be increased slightly as I have noticed I have put on a bit of weight recently, despite watching what I eat plus exercising every day. I have had an underactive thyroid since 1996 and have been on 100mg of Thyroxin for some years now. My latest results were:
TSH 4.5 (6 months ago this was 3.95)
T4 10.6 (6 months ago this was 9.5)
They have come back as 'normal' and I don't have a reference range.