Hyperthyroidism is called hyperthyroidism, caused by a variety of reasons too much thyroid hormone can affect even a set of common endocrine diseases. The main clinical manifestations eat, weight loss, fear of heat, sweating, palpitations, emotional high metabolic syndrome, nerve and vascular excitement increased, and varying degrees of goiter and eye protrusion, tremor, shin vascular murmur as the characteristics of there may be a serious risk of hyperthyroidism phase, coma or even life-threatening Similar to heart disease: nearly 10% of heart attack patients with hyperthyroidism have similar performance, such as the arrhythmia, atrial fibrillation, cardiac enlargement, heart failure can occur in severe cases. Easily be misdiagnosed as myocarditis, rheumatic heart disease. Of diarrhea emerged: some patients with hyperthyroidism as the major symptoms of diarrhea, stool several times more, the thin or the water sample. The reason is that some patients with hyperthyroidism due to thyroid hormone to increase peristalsis. Often simply considered to be chronic dysentery, colitis, or gastroenteritis, young patients were more common. Easy to be confused with the spirit of neurological diseases: excessive secretion of the hormone, so that some patients with hyperthyroidism increased excitability of central nervous system, manifested as nervousness, more articulate concern, agitation, upset, irritability, insomnia, anxiety, temper, eccentric, etc., individual patient also signs of depression, mania and other similar psychiatric symptoms, can easily be considered a neurosis, bipolar disorder, menopause syndrome. The first doctor in the eye: Most patients with hyperthyroidism have symptoms of exophthalmos of varying severity, with bilateral symmetry, is also a more significant by the side. Especially malignant eye protrusion in patients with exophthalmos, conjunctival eversion, congestion and edema, tears, and photophobia. The patients are first treatment in the eye, if the doctor is "blinders", will assume the patients with hyperthyroidism misdiagnosed as keratitis, or posterior orbital tumors. Fever as "cover": patients with fever often associated with hyperthyroidism, "inseparable", and some fever, body temperature at 37.5 ℃ - 38 ℃ between, accompanied by palpitations, rapid heart rate, etc., plus some other discomfort, easily diagnosed as rheumatoid fever, tuberculosis, urinary tract infection