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 ... More »

The most common side effect of high thyroid levels, or hyperthyroidism, is a protruding lump in the throat, which is also known as a goiter, according to WebMD. The heartbeat is sometimes irregular or very fast. Hair fal... More »

www.reference.com Health Conditions & Diseases

The most common cause of elevated thyroid levels, referred to as overactive thyroid or hyperthyroidism, is Grave's disease, notes WebMD. Other conditions, such a thyroid nodule, thyroiditis and excess iodine, can cause h... More »

The most common cause of elevated thyroid levels, referred to as overactive thyroid or hyperthyroidism, is Grave's disease, notes WebMD. Other conditions, such a thyroid nodule, thyroiditis and excess iodine, can cause h... More »

Possible causes of an overactive thyroid, or hyperthyroidism, include Graves' disease, thyroiditis, a thyroid nodule or too much iodine levels in the body, according to WebMD. Taking excessive thyroid hormone medications... More »

High levels of thyroid indicate hyperthyroidism, a condition whereby the thyroid gland produces too much thyroid hormone, according to WebMD. The most common cause of this is Grave's disease, which tends to be hereditary... More »

Abnormal thyroid levels are due to either the overproduction or underproduction of thyroid hormones, according to WebMD. Abnormal levels of thyroid hormones can cause discomfort, but in most cases, they can be well manag... More »

www.reference.com Health Medical Ranges & Levels