Hyperthyroidism, known as hyperthyroidism, may cause anemia. Hyperthyroidism is a metabolic syndrome caused by an excess of thyroid hormones in the blood circulation, which is characterized by accelerated metabolic activity, increased excitability of the nervous, circulatory and digestive systems, often with clinical manifestations such as polyphagia, emaciation, palpitations and sweating. In the case of prolonged illness, it is possible to cause complications in the hematopoietic system. Because excessive hormone secretion will cause the body’s metabolism and energy consumption to increase, secondary anemia may occur in the case of long-term nutritional deficiencies. It is recommended that patients with hyperthyroidism and anemia be treated under medical supervision.