I'm a recently diagnosed hypothyroid and am having a really fat day today, lol!! I just wondered if anyone else found a connection with heat and water retention? Prior to being diagnosed, I always noticed I bloated when I went on holiday to a hot country, in fact, I always had to take larger clothes as I bloated on the flight and then in the heat! I just thought this was normal but now I'm beginning to wonder wether my under active thyroid causes this reaction??