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www.reference.com/world-view/dangerously-high-tsh-levels-indicate-f9e504f139644150

Very high levels of Thyroid Stimulating Hormone indicate an underactive thyroid gland, or hypothyroidism, according to EndocrineWeb. High levels of TSH, which is diagnosed by blood tests, mean that the body is attempting to coax the thyroid gland into producing more of the thyroid hormone.

www.reference.com/article/dangerous-tsh-level-21-e6ce94bcddb0b272

A TSH, or thyroid-stimulating hormone, level of 21 is moderately dangerous, according to WebMD. Normal TSH levels for adults are between 0.4 and 4.2 microunits per milliliter, so a TSH of 21 potentially requires treatment from a doctor.

www.reference.com/world-view/tsh-level-b8a80fc60de0a853

TSH stands for thyroid stimulating hormone, which is a hormone released by the hypothalamus to stimulate the release of hormones from the thyroid gland. The TSH level refers to the amount of TSH found in the blood. A person's TSH level can be determined with a simple blood test.

www.reference.com/world-view/tsh-level-100-high-f4bd1e8231834119

A TSH, or thyroid-stimulating hormone, level of 100 is very high, and it rests well above the normal range of 0.4 to 4.2 microunits per milliliter for healthy adults. A level of 100 even greatly surpasses expected TSH levels for newborns, which reach up to 39 microunits per milliliter.

www.reference.com/world-view/causes-high-tsh-levels-527b425ba712ad18

Causes of high thyroid-stimulating hormone, or TSH, levels include hypothyroidism, excess anti-thyroid medication and a tumor in the pituitary gland, according to LabTestsOnline. TSH is produced in the pituitary gland, and it is partly responsible for energy metabolism, so high levels indicate dysfu

www.reference.com/article/symptoms-might-tsh-level-high-6fe014f594da10e1

Constipation, dry hair and skin, depression and increased sensitivity to cold are some of the symptoms associated with a high TSH level. Too much thyroid-stimulating hormone in the blood is a potential sign of subclinical hypothyroidism, according to WebMD.

www.reference.com/article/tsh-level-high-c70477df583941cc

An individual can determine if his TSH level is high by undergoing a TSH blood test, according to Healthline. Only a health care provider can order and interpret the results of a TSH test.

www.reference.com/article/normal-tsh-levels-c4f2e660d776886c

According to WebMD, normal levels of TSH, or thyroid-stimulating hormone, are between 0.4 and 4.2 microunits per milliliter for adults, between 0.7 and 6.4 for children and between 1 and 39 for newborns. Values outside this range may indicate a problem with the thyroid or pituitary gland.

www.reference.com/article/tsh-levels-tested-88b9abde7878e6e2

Doctors test the levels of thyroid stimulating hormone through a blood test, according to MedlinePlus. Though helpful, the test may result in excessive bleeding, accumulation of blood under the skin, light-headedness and infection due to skin breakage.

www.reference.com/world-view/causes-low-tsh-levels-ab03a54f67da614d

Causes of low thyroid-stimulating hormone, or TSH, levels include hyperthyroidism; a damaged pituitary gland that is unable to make TSH, called secondary hypothyroidism; and taking excess thyroid medicine when treating an underactive thyroid gland, explains WebMD. Women may experience low TSH levels