I have PCOS, hypothyroidism, and a BMI of 21 One of my least favorite things in this world is that fatties use PCOS and hypothyroidism as an excuse for being fat. Most of the time they haven't even been diagnosed; they just assume they have it. And some even say the doctors and tests are wrong if they come back normal. Fortunately, however, I am able to smack them down whenever this happens. FAT: "I have a thyroid problem, so I can't lose weight." ME: "Me too." FAT: "Oh but you have hyperthyroidism, which is different." ME: "No, I have hypothyroidism." FAT: "Oh...Well, I have PCOS as well, so that makes even harder to lose weight." ME: "Me too." Usually they huff off after this, hopefully realizing how full of bullshit they are. If not, the second round is just as fun. FAT: "I have [insert some injury, condition] that makes exercising hard." ME: "Yeah...tell me about it.. I had a PE when I was a teenager, it calcified, and now only 1/4 of my right lung works."