Blood sugar abnormalities caused by hyperthyroidism can be gradually recovered when hyperthyroidism is effectively controlled. It is recommended that hyperthyroidism be treated in a timely manner. Hyperthyroidism will be accompanied by hyperphagia, if the amount of food increased too much, coupled with the acceleration of gastrointestinal peristalsis, will make the body of glucose absorption faster, causing a transient increase in blood glucose. At the same time, too much thyroid hormone will affect the liver sugar metabolism, promote the accelerated decomposition of hepatic glycogen, which will also accelerate the body’s absorption of glucose, thus leading to abnormal blood glucose. Therefore normalization of thyroid hormone levels will generally promote blood sugar recovery. Hyperthyroidism can be treated with medication, radioactive iodine therapy, or surgery under the guidance of a doctor.