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Doctor insights on: Can High T4 Cause Red Face

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My free T4 is high 19.30 pmol/l and my TSH is also high 4.530 mlu/l. What does this mean?

My free T4 is high 19.30 pmol/l and my TSH is also high 4.530 mlu/l.  What does this mean?

Few possibilities: These labs seem at odds, with TSH suggesting overactive thyroid and ft4 underactive thyroid. Free T4 tests can be inaccurate in some people who have interfering substances present. Another possibility is a tumor in the pituitary secreting too much TSH resulting in thyroid overactivity, and high thyroid hormone levels. This is quite rare, however. Your doctor can help sort this out. ...Read more

Dr. David Sneid
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Thyroxine (Definition)

Thyroxine is a thyroid ...Read more


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Tsh 5.4, T4 7.6 plus low red blood cell count, high ldl, hdl, vldl & triglycerides r high. What other test can tell me what caused my thyroid to stop?

Tsh 5.4, T4 7.6 plus low red blood cell count, high ldl, hdl, vldl & triglycerides r high. What other test can tell me what caused my thyroid to stop?

It doesn't matter: A test of antithyroid antibodies may suggest that thyroiditis caused your decline in thyroid level, but it doesn't matter since the appropriate therapy is brand name T4 replacement, no matter what the cause. Also, your minimal level of thyroid deficiency is insufficient to cause you lipid abnormalities. Look for other causes, such as genetics, weight, diet, inactivity, etc. ...Read more

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Can high free T4 level cause lightheadedness?

Can high free T4 level cause lightheadedness?

Hyperthyroidism : Hyperthyroidism can lead to dizziness. Find out the cause for the hyperthyroidism and get it treated accordingly. ...Read more

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High t3, (liothyronine) T4 and normal, what can cause this?

High t3, (liothyronine) T4 and normal, what can cause this?

T3 (liothyronine) determination: Isn't helpful. If "normal" means you TSH was normal, then don't worry because everything is ok unless you're already taking some sort of thyroid medication. Ask your doctor to explain the test results, that's what they're there for. ...Read more

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If my TSH is low and T4 high, would thus cause difficulty thinking?

If my TSH is low and T4 high, would thus cause difficulty thinking?

Possibly: If your numbers were very skewed you might have trouble thinking. Generally by the time you are having trouble with mentation you are clearly having trouble with temperature, sleep, fatigue, bowel movements and appetite as well. Sometimes elder patients have more mental than physical symptoms. ...Read more

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Low TSH high free t4? What is the cause?

Hyperthyroidism: High ft4 and low TSH are a combination usually indicating an over active thyroid. It doesn't explain the cause which will require further testing to figure out. ...Read more

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My TSH was 3.18 but my free T4 was a 1.8 which was high. Will the high free T4 cause any problems?

My TSH was 3.18 but my free T4 was a 1.8 which was high. Will the high free T4 cause any problems?

Cannot diagnose: You need a full assessment correlating your lab values with clinical symptoms. Taking the numbers alone is not appropriate for any purpose, but elevated thyroid hormone levels can suggest hyperthyroidism. You must discuss this with the doctor who ordered these tests. Good luck. ...Read more