Symptoms of elevated thyroid include weight loss, concentration problems, inability to withstand heat and anxiety, states Healthline. Abnormal heart rhythms, excessive sweating, high blood sugars and restlessness may also indicate that a person has excess thyroid hormone.
Other symptoms of hyperthyroidism include breast development in men, sleeplessnes, hair loss, increased bowel movements and shaky hands, according to Healthline. Enlargement of the thyroid, also known as goiter, is common among people with overactive thyroid. Women with elevated thyroid may experience menstrual cycle changes. Nausea, vomiting and itching are other symptoms that may signify a person has excessive amounts of thyroid hormone.
Graves' disease is the most common cause of hyperthyroidism, explains Healthline. Thyroiditis, which is inflammation of the thyroid gland, excessive intake of tetraiodothyronine via medications or supplements, and too much iodine in the body may lead to overactive thyroid disease as well.
Treatment of hyperthyroidism includes taking antithyroid medications and radioactive iodine to inhibit the activity of cells that produce the thyroid hormone and surgery, which involves removing the thyroid, notes Healthline. However, patients must take thyroid supplements after surgery to prevent underactive thyroid disease. Taking calcium and vitamin D supplements as well as maintaining correct portions of sodium and calories may be helpful after treatment as well.