Hyperthyroidism often manifests itself in the form of hypermetabolic symptoms such as agitation, panic, fatigue, and may present hazards such as protruding eyes, edema, and heart failure. Specific as follows: 1. Symptoms: weight loss, emaciation; increased appetite, increased bowel movements, diarrhea or increased stools; may have palpitations, shortness of breath, a little activity can be significantly aggravated, most of the sinus tachycardia, rest and sleep heart rate is still fast for the characteristics of this disease; arrhythmia: such as the emergence of preterminal systole or atrial fibrillation, and so on. At the same time, there may be emotional irritability, poor concentration, even insomnia, hand tremor; fear of heat, excessive sweating, fatigue; varying degrees of goiter; women may experience prolonged menstrual cycle, scanty menstruation, or even amenorrhea. 2. Hazards: protruding eyeballs; hyperthyroid heart disease: the emergence of serious arrhythmia, heart failure; pre-tibial mucous edema, and so on. Patients with hyperthyroidism should pay attention to a low iodine diet, try not to eat seafood, maintain a good work and rest, and go to the endocrinology department as soon as possible.