What Causes Thyroid Nodules To Grow?
What Causes Thyroid Nodules To Grow? The majority of thyroid nodules are caused by an overgrowth of normal thyroid tissue. The cause of this overgrowth is usually unknown, but there is a strong genetic basis. In rare cases, thyroid nodules are associated with: Hashimoto’s thyroiditis, an autoimmune disease that leads to hypothyroidism. Is it bad