Nov 30, 2022 · Hyperthyroidism can be caused by several medical conditions that affect the thyroid gland. The thyroid is a small, butterfly-shaped gland at the base of the neck.

Graves’ disease is the most common cause of hyperthyroidism. Your chances of developing it increase if you have a biological family history of thyroid disease and/or another autoimmune condition.

Jul 8, 2025 · What causes hyperthyroidism? A variety of conditions can cause hyperthyroidism. Graves’ disease, an autoimmune disorder, is the most common cause of hyperthyroidism.

Graves’ disease, the most common cause of hyperthyroidism, is an autoimmune disorder. With this disease, your immune system attacks the thyroid and causes it to make too much thyroid hormone.

Apr 11, 2024 · Hyperthyroidism is when your thyroid -- the butterfly-shaped gland at the bottom of your neck, just above your collarbone -- makes too much thyroid hormone. Because your body relies on …

Hyperthyroidism means your thyroid gland is too active. This tiny gland is found in your neck. An overactive thyroid gland makes too much thyroid hormone. This makes your metabolism work at a …

Find out what can cause an overactive thyroid (hyperthyroidism), including Graves' disease, thyroid nodules and an increased level of iodine in the body.

Apr 21, 2021 · Graves’ disease is the most common cause of hyperthyroidism. It is an autoimmune thyroid condition caused by antibodies that stimulate all the cells in the thyroid gland to make too …

When levels of these hormones are high, it causes hyperthyroidism. Certain medical conditions can lead to your thyroid gland making more hormones than you need. Common causes of an overactive …

Apr 11, 2025 · Hyperthyroidism is a condition in which your body makes too much thyroid hormone. It is also called overactive thyroid. Thyroid hormones are made by the thyroid gland. The thyroid gland is …