Thyroid-Stimulating Hormone Blood Test (TSH)

The TSH blood test (thyroid-stimulating hormone) check for the thyroid gland for problems. The test measures the amount of thyroid stimulating hormone (TSH) in the blood. This hormone is produced in the pituitary gland. The thyroid gland needs it in order to produce the right levels of thyroxine (T4) and triiodothyronine (T3).

A thyroid gland that is producing low levels is usually an indication of hypothyroidism. If you suffer from low levels you may experience weight gain, tiredness, constipation, feeling too cold, dry skin, or frequent menstrual cycles.

If your TSH levels are too high you may suffer from hyperthyroidism or an over active thyroid. This will result in weight loss, heart rate increases, always feeling hot, and maybe diarrhea or irregular periods (for women).

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