UNCLE

I don't think so. I also have hypothyroidism and a symptom is that people get cold easily. I wish.

I'm in the market for a new Rheumatologist so this is not from my doctor but I've read in many places it may be the fibromyalgia. There is a lot of false info about it on the internet though so take that with a grain of salt. Or a shaker. Now, long before fibro was an issue, even as a child I was always "hot blooded" in culottes (hey, they were cool and shorts weren't allowed in school) when others were bundled up in long pants, shirts and coats. I've never liked hot showers and I've never liked heat. But it wasn't an intolerance like it is now. My body temp is actually on the low side though, my normal is below 98, has been my entire life. But I get hot super easy, and when I am I feel weak and dizzy frequently, and it takes a lot to cool me down and it takes a while to do it. After a shower I often have to lay down nekkid for 30 minutes. The opposite is not true for any of this with cold temperatures. I am very overweight, but these extreme symptoms did not hit until after a decade of being this size.

The only other thing I've seen that it might be, but again haven't discussed it with my endocrinologist, is one of my most recent blood tests. I can't remember the name of it so I will post this and then go grab that info for you. eta: I have had a recurring benign tumor on my pituitary gland. That particular type of tumor hasn't come back, but I have a repeated blood test result (IGF-1) and about a billion symptoms that suggests a different kind might have on the same gland. (Acromegaly). They're rare, but that's how my life works. Some of the symptoms are weakness, faintness and dizziness. My endocrinologist will check for this at the next visit. And now that I think about it, I don't know if heat intolerance is a symptom, I think it is exercise intolerance so very likely not something you even need to consider considering

eta: The recurring dizziness is slightly worrying. I'd see a doctor for that alone. One of the things they were concerned about with me is my heart but that baby has been checked in so many ways including tons of EKGs, blood tests (CPR plus some I don't remember), echocardiogram, stress test, Holter monitor, even a heartCT so that was ruled out. When I fainted the other major concern both from the EMTs (I was at a race as a spectator) and at the ER (was at home before colonoscopy so my gastroenterologist sent me there) was my blood sugar level. At the ER they also did a chest X-ray.

Sorry, I just realize I did sort of a "brain dump" of all the issues and thoughts and experience I've had with the subject, thought you could weed through it and decide what, if any of it, might apply to you so you could take it to your doctor. It's scary and miserable so I hope you figure it out soon!