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Doctor insights on: Low T4 And High Tsh Levels

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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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I have a high TSH but normal T4 levels, what does this mean?

I have a high TSH but normal T4 levels, what does this mean?

Hypothyroidism: The TSH test is10 times more sensitive for the diagnosis of hypothyroidism that the t4. The TSH is reported on a log scale so that small changes in the TSH value are caused by relatively big changes in the blood level. This is a reflection of the pituitary being extremely sensitive to change in the T3 (liothyronine) level if you have symptoms it would be wise to seek treatment. ...Read more

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High TSH levels but normal T4 levels, i don't understand what this means?

High TSH levels but normal T4 levels, i don't understand what this means?

Early hypothyroidism: If the elevated TSH persists, it generally indicates early hypothyroidism, which can easily be diagnosed and treated by your doctor. ...Read more

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33 yr M 6'2 185 pounds. High TSH levels but normal free T4, whst exactly does this mean?

33 yr M 6'2 185 pounds. High TSH levels but normal free T4, whst exactly does this mean?

Subclinical hypothyr: Hi. That is commonly seen, now that we screen so well for disorders of thyroid function. It's called subclinical hypothyroidism, meaning that with extra push from the pituitary (TSH), the remaining thyroid tissue is able to make thyroid hormone in the normal range. You should start taking thyroid hormone now, and not wait till your metabolic tank is empty. Good luck! ...Read more

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Can a high TSH level but normal T4 cause hypothyroid symptoms or not?

Can a high TSH level but normal T4 cause hypothyroid symptoms or not?

Yes: Hypothyroidism can be primary - caused by a weak thyroid gland or secondary to other hormonal problems, like a pituitary problem. Or your thyroid can become dysfunctional secondary to high insulin, estrogen or cortisol. If you have functional hypothyroidism, this problem can go undetected by routine screening tests. More extensive testing can often reveal abonormalities. This is very common. ...Read more

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Can you still be hypo after having high TSH -6.97 months back and now 5.9- neg antibodies? Thyroid US done which was fine. T4 low normal range.

Can you still be hypo after having high TSH -6.97 months back and now 5.9- neg antibodies? Thyroid US done which was fine. T4 low normal range.

High TSH, low thyro: Your pituitary gland tells you that you are not having enough thyroid by producing more TSH. Thus whenever it is high, it means you need more thyroid. ...Read more

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What does it mean if I have high tsh, t3, (liothyronine) T4 levels?

What does it mean if I have high tsh, t3, (liothyronine) T4 levels?

HiTSH=hypo,hiT4 hype: Thyroid function is measured many ways. The TSH is your body's call for more hormone, so a high TSH suggests underactive thyroid, very low TSH overactive. The t4/t3 levels are measures of circulating hormone, so high T4 or T3 (liothyronine) suggest hyperthyroidism and vice versa. T4 levels can beaffected by hormones and so need to be interpreted carefully. For initial testing, the TSH alone best test. ...Read more

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My thyroid panel shows low T3 (liothyronine) (29), normal T4 (8.10) and high TSH 3.16. What does this mean

My thyroid panel shows low T3 (liothyronine)  (29), normal T4 (8.10) and high TSH  3.16. What does this mean

TSH normal: Your TSH is normal and your thyroid appears to be functioning properly. Ignore the "t3" as it's not a real measurement of T3 (liothyronine) level. ...Read more

Dr. David Sneid
1,375 doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid ...Read more