![]() Because the stored thyroid hormone has been released, patients may become hypothyroid (where their thyroid gland produces too little thyroid hormone) for a period of time until the thyroid gland can build up new stores of thyroid hormone. Over time the thyroid usually returns to its normal state. This inflammation causes the thyroid to release excess amounts of thyroid hormone into the blood stream which leads to hyperthyroidism. Sub-acute thyroiditis - This type of hyperthyroidism can follow a viral infection which causes inflammation of the thyroid gland.Like other autoimmune diseases, this condition may occur in other family members and is much more common in women than in men. Patients may notice the eyes become more prominent, the eyelids do not close properly, a gritty sensation and general irritation of the eyes, increased tear production, or double vision. In some patients, the eyes may be affected. Patients with Graves’ disease often have enlargement of the thyroid gland and become hyperthyroid. Graves' disease - Graves' disease is an autoimmune disorder in which the body's immune system attacks the thyroid.In many cases, a person may have had a multinodular goiter for several years before it starts to produce excess amounts of thyroid hormone. This is most often found in patients over 50 years old. Toxic multinodular goiter - If the thyroid gland has several nodules, those nodules can sometimes produce too much thyroid hormone causing hyperthyroidism.Toxic nodule - A single nodule or lump in the thyroid can produce more thyroid hormone than the body needs and lead to hyperthyroidism.Hyperthyroidism can be caused by a number of things: In its mildest form, hyperthyroidism may not cause noticeable symptoms however, in some patients, excess thyroid hormone and the resulting effects on the body can have significant consequences. This disorder occurs in about 1% of all Americans and affects women much more often than men. Hyperthyroidism occurs when the thyroid gland produces too much thyroid hormone. ![]()
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