Thyroid UK
82,957 members97,991 posts

Borderline hyperthyroid

Hi I'm new here looking for advice, here is my story. Approx 4 months ago, after a bout of flu, I noticed my neck was swollen. I was having neck pain, hoarseness, itching all over, insomnia and a feeling of a lump in the throat. I had some blood tests done here are the results: TSH 0.992 range 0.27-4.2. Free T4 22.87 range 12-22. Free T3 3.8 range 3.1-6.8. TPO antibodies were negative. My doctor said I was borderline hyperthyroid. Can these levels cause my symptoms given that they are borderline? And how long will this last? My doctor wants to retest in two months but I feel awful. Any advice or comments would be much appreciated.

3 Replies

Your doctor is totally wrong. He doesn't understand the FT3, does he. That is right scraping along on the bottom of the range, and it is that that is causing your symptoms. Whatever you do, do not accept treatment for hyperthyroidism. That will make you worse. You are hypothyroid.

I think your doctor is just looking at the FT4, which is high. ish. But the reason for that is that you cannot convert it very well at all. T4 is the storage hormone, and has to be converted into T3, the active hormone, which is needed by every single cell in your body.

But, even so, if you were hyper - and I don't believe in 'borderline' hyper, that's just silly - your FT4 would be much higher, your TSH would be much lower, and your FT3 would be way over range.

Your TSH is actually just nice. But with that low FT3, it should be a lot higher. It could be that you have a pituitary problem where the pituitary is unable to secrete enough TSH. But, you could also have the DIO2 gene defect which means you cannot convert. Or, you could have both. Either way, the problem is not with your thyroid gland itself.

I do hope I'm not confusing you, here. It is complicated for someone just starting out, I know. But please feel free to ask questions if there's something you don't understand.

So, what we have to think about now is your next step. There are several possibilities. a) ask your doctor to refer you to an endo to check for secondary hypo, where the problem is with the pituitary or the hypothalamus, not the thyroid gland.

b) get a DIO2 gene test - but, you can't get that on the NHS. If you have that defect, it means you cannot convert T4 to T3 (so are therefore dependant on the little that your gland is capable of making). But, you won't get that on the NHS. It would have to be private.

c) get your vit D, vit B12, folate and ferritin tested. It could possibly be that your conversion problem is due to low nutrients. This is rather a long-shot, but worth doing, anyway. Your doctor should be able to test those, if he's willing. If not, it's always possible to get them done privately. Details of private testing on TUK home page.

Sorry I can't be of more help, and sorry this is so complicate, but the most important thing for you to know is that you are hypo, and your symptoms are due to low T3. You are not hyper. :)


I totally agree with greygoose.

If you haven't already found it, here's a link to the ThyroidUK website. It is very informative.

Read as much as you can so that you can argue etc with your doctor. Any queries do post here and you'll get help.

1 like

hi thanks for your kind response. I have some results that may help my B12 is 257, folate 10.3 and coeliac test 0.8. I dont have any ranges for these results but hope they mean something to you? Thanks again


You may also like...