Serum thyrotropin 8.34 μIU/ml is abnormal. Thyrotropin has the function of promoting the synthesis and secretion of thyroid hormones, and the normal range of thyrotropin is 0.35 to 5.5 μIU/ml, so 8.34 μIU/ml is not in the normal range. Due to different examination methods and reagents, the reference indexes are different in each hospital and need to be analyzed specifically. Elevated serum thyroid stimulating hormone may be caused by hypothyroidism. Patients with hypothyroidism may have symptoms such as fatigue, chills, dry skin, loss of appetite, facial swelling, etc., and they need to go to the endocrinology department of the hospital in time for diagnosis and treatment, and the treatment usually adopts oral administration of levothyroxine to help restore the level of thyroid hormone. If abnormal serum thyroid stimulating hormone indexes are found, attention should be paid and treatment should be carried out in accordance with the doctor’s instructions.