What Are the Causes of Slightly Elevated Thyroid Levels?

By Staff WriterLast Updated Apr 12, 2020 9:24:53 PM ET

Slightly elevated thyroid levels may be caused by a condition called hyperthyroidism. Hyperthyroidism, also referred to as an overactive thyroid or overactive thyroid disease, occurs when the thyroid gland produces more thyroid hormones than the body needs, explains WebMD.