Thyroid stimulating hormone (TSH) tells the thyroid gland to produce hormones. High TSH levels usually indicate that the thyroid is underactive and needs more stimulation in order to work. But, some ...

Central hypothyroidism is when your thyroid hormone levels are low because your hypothalamus or pituitary gland isn’t functioning properly. Hypothyroidism — also called an underactive thyroid — is a ...

Myxedema is a severe form of hypothyroidism (underactive thyroid) causing skin swelling and thickening. Other symptoms include low heart rate, weakness, and cold intolerance. A myxedema crisis is when ...