Hi all, new here and wonder if I can ask a strange question? Has anybody's thyroid issues made them prone to fainting? I was formally diagnosed as wildly hyper 3 years ago and given carbimazole. I've swung between hyper and hypo ever since and had RAI in April. I went hyper again and am back on carb. I feel absolutely terrible- as bad as I did before diagnosis. The main problem us that I am absolutely terrified of being out somewhere and fainting. I have no history of fainting and have never passed out so I don't know why this is causing me such anxiety. I just feel so dizzy, woolly headed and my arms and legs feel so weak that it's a constant thought at that back of my mind whenever I go out. I know logically that if I haven't fainted yet then the odds are that I'm not likely to start now but it's starting to cause problems in that if I can avoid going out then I will. Am I going mad? Any ideas how to deal with this?