The thyroid gland is responsible for maintaining the proper metabolism of the body. Primary hypothyroidism is a very common disease which is caused by a disease in the thyroid.
In primary hypothyroidism, the thyroid glands do not release appropriate amount of thyroid hormones, as a result, the pituitary gland release more thyroid-stimulating hormone to give signals to the thyroid gland to increase their secretion. So thyroid-stimulating hormone levels become elevated in the patient with primary hypothyroidism.
