I am new here and am a little confused to say the least. Following routine thyroid test and ultrasound, I will have an operation in two weeks. Multiple benign nodules and one large one (29x31x59 MM.). My FT3 on bloods is 3.59 (range 2.3 - 3.9) and FT4 is 0.96 (range 0.61 - 1.25). My TSH is the bad one at 0.06 (0.34 - 5.6 range) and the Doctor says my hormone levels are way to high and causing the growths so I need gland removal as soon as he gets my levels down with Propycil over the next two weeks. Does this all mean I have Hyperthyroidism? It just doesn't make proper sense, as I have always struggled with weight gain and I thought people who were Hyper had weight loss. Can anyone explain it in simple terms please?