The normal value of thyroid stimulating hormone is 0.35-5.5μIU/ml, 5.64μIU/ml is a little higher, whether it is serious or not needs to be combined with other indicators of thyroid function to determine, it is recommended to consult a doctor. Thyroid stimulating hormone is mainly secreted by the pituitary gland, and its main function is to promote the synthesis and secretion of thyroid hormone and maintain the growth and development of thyroid follicles. High thyroid stimulating hormone can be seen in primary hypothyroidism, Hashimoto’s thyroiditis, recovery from subacute thyroiditis, pituitary tumors, and so on. Intake of lithium metal, potassium iodide, and thyrotropin-releasing hormone can also increase thyrotropin. Thyroid stimulating hormone 5.64μIU/ml should go to the hospital, further improve the examination to clarify the diagnosis, under the guidance of the doctor according to the cause of the disease and the patient’s specific situation treatment.