What are the causes of thyroid disease?

The most common cause of hyperthyroidism is an autoimmune condition called Graves' disease. The body's immune system creates an antibody that causes the gland to make an excessive amount of thyroid hormone. Graves' disease runs in families, and usually affects younger women. Thyroiditis. read more

All types of hyperthyroidism are due to an overproduction of thyroid hormones, but the condition can occur in several ways: Graves' disease: The production of too much thyroid hormone. read more

If your body's immune system causes thyroid disease, other glands, including your ovaries, may be involved. This can lead to early menopause (before age 40). Problems getting pregnant. When thyroid disease affects the menstrual cycle, it also affects ovulation. This can make it harder for you to get pregnant. Problems during pregnancy. read more

Graves' disease is the most common cause of hyperthyroidism. This condition occurs when the immune system produces an antibody that stimulates the entire thyroid gland; this leads to overactivity and higher levels of thyroid hormones. read more