Medically reviewed by Kelly Wood, MDKey TakeawaysThyroid blood tests help figure out how well your thyroid gland is ...

Subclinical hyperthyroidism means that a person has low or undetectable levels of thyroid-stimulating hormone (TSH) with normal levels of free thyroid hormones. It usually does not cause symptoms. The ...

Hyperthyroidism (overactive thyroid) doesn’t usually cause weight gain, though it may cause other weight changes. Sometimes, treatment for hyperthyroidism can lead to weight gain. Hyperthyroidism ...

Left untreated, certain symptoms of hyperthyroidism and hypothyroidism, such as heart palpitations or a slowed heart rate, can lead to feelings of dizziness or vertigo. Feelings of dizziness and ...