Subclinical hypothyroidism is a mild form of hypothyroidism. It occurs when only one of two main thyroid levels is elevated. It doesn’t usually cause symptoms, and it’s unclear how or if it affects ...
Thyroid blood tests help figure out how well your thyroid gland is working. TSH helps the thyroid gland know when to make more thyroid hormones. Free T4 is the type of hormone that becomes active when ...