Hyperthyroidism will show a state of high metabolism and sympathetic excitability, with over consumption of nutrients and malabsorption, which can easily lead to anemia. High levels of thyroid hormones in hyperthyroidism lead to a state of high metabolism and sympathetic arousal. The body consumes more nutrients, such as vitamin B12, folic acid, protein and iron, etc., which will be consumed in large quantities and lead to anemia when the body does not have enough nutrients to produce red blood cells and hemoglobin. In addition, hyperthyroidism patients may appear gastrointestinal peristalsis increased, resulting in food emptying too quickly after eating, but iron, folic acid and other nutrients in the food is not fully digested, absorbed before being discharged from the body, will also induce anemia. Hyperthyroidism patients with anemia symptoms should actively cooperate with the doctor for treatment.