What is thyroid hyperthyroidism?

Thyroid hyperthyroidism is also hyperthyroidism, referred to as hyperthyroidism, mainly thyroid hormone secretion is excessive, causing nervous, circulatory, digestive and other system excitability increased and hypermetabolism phenomenon. Hyperactivity, eyeball, temper, increased appetite, weight loss and other symptoms. Severe can cause arrhythmia, even life-threatening.