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About Hypothyroidism

The thyroid is a butterfly-shaped gland in the middle of the neck, located below the larynx (voice box) and above the clavicles (collarbones). The thyroid produce two hormones, triiodothyronine (T3) and thyroxine (T4), which regulate how the body uses and stores energy (also known as the body's metabolism).
Thyroid function is controlled by a gland in the brain, known as the pituitary. The pituitary produces thyroid-stimulating hormone (TSH), which stimulates the thyroid to produce T3 and T4.
Hypothyroidism is the medical term for when a person does not make enough thyroid hormone.
There is a gland in your neck called the thyroid gland. It makes thyroid hormone. This hormone controls how the body uses and stores energy. Hypothyroidism is the medical term for when a person does not make enough thyroid hormone.



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Hypothyroidism causes

In about 95 percent of cases, hypothyroidism is due to a problem in the thyroid gland itself and is called primary hypothyroidism. However, certain medications and diseases can also decrease thyroid function. As an example, hypothyroidism can also develop after medical treatments for hyperthyroidism, such as thyroidectomy (surgical removal of the thyroid) or radioactive iodine treatment (to destroy thyroid tissue).

In some cases, hypothyroidism is a result of decreased production of thyroid-stimulating hormone (TSH) by the pituitary gland (called secondary hypothyroidism). Thyroid problems are more common in women, increase with age, and are more common in whites and Mexican Americans than in blacks.


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Treatment
Medications during Pregnancy