Symptoms of low thyroid-stimulating hormone, or TSH, levels due to hyperthyroidism include rapid heartbeat, sudden weight loss, nervousness, tremors and increased appetite, notes Mayo Clinic. Some symptoms of low TSH lev... More »

Low thyroid-stimulating hormone, or TSH, levels can lead to symptoms such as fatigue, leg cramps, dry skin and a feeling of being too cold and can cause an underactive thyroid gland, or hypothyroidism, explains Cleveland... More »

Treatment for high TSH thyroid levels, also known as hypothyroidism, typically involves thyroid replacement medication such as levothyroxine or synthroid, which are synthetic thyroid hormones, according to Healthline. Th... More »

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 »

A low TSH with elevated levels of T3 and T4 indicates an overactive thyroid, or hyperthyroidism. Hyperthyroidism occurs when thyroid hormone levels are elevated, which causes an increase in metabolism, and raises the ris... More »

www.reference.com Health Medical Ranges & Levels

Low thyroid-stimulating hormone, or TSH, levels can lead to symptoms such as fatigue, leg cramps, dry skin and a feeling of being too cold and can cause an underactive thyroid gland, or hypothyroidism, explains Cleveland... More »

According to About.com, low levels of TSH, or thyroid-stimulating hormone, occur when the pituitary gland shuts down TSH production due to high levels of thyroid hormone in the blood. The low levels of TSH are the pituit... More »