There are several possible causes for high thyroid levels, including Graves' disease, toxic adenoma, Plummer's disease and thyroiditis, according to Mayo Clinic. The general term used when a patient has an overactive thy... More » Health Conditions & Diseases

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 » Health Medical Ranges & Levels

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 »

Hyperthyroidism is caused by conditions such as toxic adenoma, Grave's disease, thyroiditis and Plummer's disease, explains the Mayo Clinic. The thyroid gland is fairly small but produces two important hormones that dire... More » Health Conditions & Diseases

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 thyroid peroxidase antibodies indicate that the patient has an autoimmune disorder such as Graves' disease or Hashimoto's disease, according to Mayo Clinic. Most people who are diagnosed with thyroid disease typical... 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 » Health Conditions & Diseases