Hyperthyroidism affects TSH levels, causing them to fall below expected ranges. Hyperthyroidism can occur when the thyroid gland in the neck produces too much thyroid hormones, including ...
Primary hyperthyroidism occurs due to issues within the thyroid gland. Secondary hyperthyroidism is due to the pituitary gland overstimulating the thyroid. To diagnose the type of hyperthyroidism, ...