I have been diagnosed as a thyroiditis patient for the past 7 years . It was started as hyper and within few months changed into hypo . My TSH level was almost constant for few years with 50 mcg of levotroxyne. But suddenly TSH level became 0.105 microu/ml and the doctor reduced the dosage to alternate 50/25 mcg of medicine. At that stage I was experiencing all the problems of hyper like rapid heartbeat etc. Can someone give me an insight on this problem?? Does this indicate that my thyroid is functioning normally???