Yes, your TSH can show hypo and your FT3 and FT4 hyper or vice versa.
In a nutshell, here's what happens. Your hypothalamus (part of your brain) senses your thyroid hormone levels. If levels are too low, the hypothalamus sends a message to your pituitary (master endocrine gland located in your head), and your pituitary sends out some TSH to stimulate your thyroid to produce hormones. If it's not dysfunctional, the thyroid does just that...pumps some T4 into your blood. Later, the T4 has to be converted to T3 so that your cells can use it. Most of that happens in your liver. Conversion is really a separate process.
So FT3 and FT4 are a DIRECT measure of thyroid function. They tell you exactly what the thyroid is putting out. TSH, on the other had, can be affected by any number of factors in the hypothalamus, pituitary, etc. Sometimes people are hypothyroid even though there is nothing wrong with their thyroid...the pituitary doesn't put out enough TSH to stimulate hormone production. This is called secondary hypothyroidism and is really a pituitary dysfunction.
I have a condition (in addition to my Hashi's) called pituitary resistance to thyroid hormone. To make a long story short (?), my pituitary lacks an enzyme that converts T4 to T3. My pituitary is starved for T3 and thinks the rest of my body is. too, so my TSH remains high (hovers around 20.0) even though I am asymptomatic and euthyroid.
So, you can see that although the whole process sounds good on paper, and in a perfect world, TSH "should" be a reliable test, too often something gets in the way and messes the whole thing up. The two conditions I mentioned are only a couple of the things that can make TSH useless.
The endo you talked to sounds like one I'd stay away from. Obviously, not everything is thyroid-related, but neither can they be dismissed offhand as not being related to thyroid. Yes, those can be symptoms. As you mentioned, symptoms often "cross over". i.e. they can be symptoms of both hypo and hyper, which is why it's important to test FT3 and FT4 to help distinguish between the two.
I hope that helps to clarify some.
Regarding the endo in PA, try PMing "gimel"...he keeps a list of doctors that have been recommended by thyroid patients. I don't know if he has one in your area or not.
PS. The doc who checked my TSH only was a family doctor...and he wanted me to see an endo to control it....but so far....endo have done NOTHING AT ALL TO HELP ME!!!!!!!!!! Can someone please find me a doc in western PA!!!!!!
Hey, thats what I thought about the hyper...although I have hear this and that about hypo. Can you TSH show hypo but you FT3 and FT4 show hyper? Or something like that...I wish someone could explain it to me in laymens terms...noone is explaining anything to me!!!! I tried to get a hold of a endo for over the wknd. I talked to her and she said, and I quote, "Hashimotos does not have any symptoms" and "your TSH is just borderline" as well as (chest pain and chest pressure and all my symptoms) "are unrelated"
I asked if I should up my dose....but now that you mention it maybe I shouldn't! I REALLY NEED SOME WISDOM. PLEASE HELP.
If your doctor is only testing TSH, then you need a new doctor. TSH is volatile and can vary significantly even intraday. A doctor who bases treatment on TSH is going to keep you sick, plain and simply.
Your symptoms are more clasically symptoms of hypER or overmedication than hypo, yet your TSH is looking somewhat hypO...time to resolve that inconsistency by testing FT3 and FT4 to see what's going on with those levels. Testing TSH only is really providing NO information.
hi. I'm on generic. See my doc won't send me for a stress test...because he doesn't think its my heart. Which I kind of doubt it too...with my age and all those tests. I do have some anxiety...but I think its because of all of this! LOL I'm sorry you are going through this.......
Sorry, I am also hypo from Hashimotos
Are you on Synthroid or a generic form of it? Same thing has happened to me since starting my medicine. My heart just starts beating really fast, have went to the ER once. They told me the same thing they told you, everything lOols normal. Doesn't feel normal to me. I go to a cardiologist in a few days for stress test and to have an event mOnitor. Do you also have anxiety and panic? I have awful panic attacks that go along with everything else.
There are some great people in this forum who know so much about all of this, I don't know what I would do without them. Hope you get some relief and answers soon.
I'm 34, doc said same thing about my age.