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Doctor insights on: How High Can Tsh Go

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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. Quang Nguyen
893 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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Why were my TSH levels so high?

Why were my TSH levels so high?

Was not producing: enough thyroid hormone- underactive when on correct dose, it will return to normal tsh ...Read more

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Tsh level is 5.69 is that high?

Tsh level is 5.69 is that high?

A little: It depends on the lab but that is just a bit elevated. Generally a lab test called free T4 is done when this borderline. If the free t 4 is low that would confirm that you are hypothyroid. When the numbers are borderline often down the road they will become frankly abnormal. If there are symptoms such as fatigue and weight gain then i would be more inclined to treat sooner then later. ...Read more

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What can cause a false high tsh?

What can cause a false high tsh?

Not much: Any lab can have a temporary problems doing any test accurately. That is why an abnormal level should always be repeated to verify it. There are temporary causes for high TSH (resolving subacute thyroiditis), so that a 2nd TSH level done a few weeks after an abnormal one, could be normal. Subclinical hypothyroidism will have a high TSH with other thyroid levels normal, no symptoms. ...Read more

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What is high tsh, 3rd generation?

What is high tsh, 3rd generation?

Same as others: The 3d generation TSH assays are best at the lowest ranges - the upper range is debatable as tsh, unlike most products in the blood is not distributed in populations in a bell curve. The upper limits of the "normal" range of 4 to 5 in assays of all generations is probably wrong. ...Read more

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My TSH level was 320. Is that too high?

TSH 320: This value is very high. It means that your thyroid gland is seriously underactive. There are potentially serious consequences of underactive thyroid gland. Evaluation and correction is essential. It takes considerable time. I hope you are receiving care and are already on thyroid hormone replacement therapy. ...Read more

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Is a TSH level of 2.20 too high for a person?

No: If it is below 5 it is normal. So you do not need to worry. ...Read more

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What should my TSH level be is 10.4 to high or to low?

What should my TSH level be is 10.4 to high or to low?

Too high: That indicates that you have hypothyroidism. You need to be seen and started on thyroid replacement. ...Read more

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What foods should you avoid when your thyroid TSH is high?

What foods should you avoid when your thyroid TSH is high?

Fatty junk food: The same as you should avoid no matter who you are or what your thyroid level is. The food you eat won't affect your thyroid. Only taking the correct amount of brand name T4 replacement will return your thyroid lab to normal. ...Read more