TSH Blood Test
Thyroid Stimulating Hormone (TSH) is made by the pituitary gland. It normally stimulates the thyroid to produce its hormones. In hypothyroidism, TSH is not used by the thyroid, and its levels remain high in the blood. A TSH blood test checks for increased levels of this hormone.
A TSH blood test is a common and important test for diagnosing hypothyroidism, a condition in which the thyroid gland produces fewer hormones than the body needs.
A laboratory nurse or technician will insert a needle into a vein in one of your arms, to collect a sample of your blood. You may feel a slight sting or moderate pain when the needle is inserted to draw your blood. This blood sample is then analyzed in a laboratory for TSH levels.
You may return home after the test and resume your normal activities. Some people may feel throbbing in their arm after the test, or feel slightly dizzy or faint.
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