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 »

Treatment for high thyroid levels may depend on age, severity and cause, with available options including surgery, anti-thyroid medication, radioactive iodine and beta-blockers. The condition in which the thyroid glands ... More »

www.reference.com Health Medical Ranges & Levels

Constipation, dry hair and skin, depression and increased sensitivity to cold are some of the symptoms associated with a high TSH level. Too much thyroid-stimulating hormone in the blood is a potential sign of subclinica... More »

www.reference.com Health Medical Ranges & Levels

Having an elevated thyroid level is a condition known as hyperthyroidism, meaning the thyroid gland is producing too much of the thyroid hormone thyroxine, according to WebMD. Hyperthyroidism has various causes, such as ... More »

An overactive thyroid produces more thyroid hormones than the body needs, and the medical term for the condition is hyperthyroidism, according to WebMD. Women have a higher risk of developing the condition than men. More »

www.reference.com Health Conditions & Diseases

The purpose of thyroid surgery is to remove all or part of the thyroid gland to treat thyroid nodules, hyperthyroidism or thyroid cancer, according to WebMD. It may also be performed to take a tissue sample to check for ... More »

www.reference.com Health Conditions & Diseases

Causes of low thyroid-stimulating hormone, or TSH, levels include hyperthyroidism; a damaged pituitary gland that is unable to make TSH, called secondary hypothyroidism; and taking excess thyroid medicine when treating a... More »