Low thyrotropin hormone of 0.01 μIU/ml is usually abnormal and may be hyperthyroidism, secondary hypothyroidism. Usually thyrotropin values of 0.35 to 5.5 μIU/ml are in the normal range, and thyrotropin is low by 0.01 μIU/ml, so it is usually abnormal. In addition to a low thyrotropin of 0.01 μIU/ml, T3 (triiodothyronine) and T4 (thyroid hormone) levels are elevated in hyperthyroidism. The patient may show symptoms such as easy hunger, weight loss, easy agitation, and protruding eyes. In secondary hypothyroidism, T3 (triiodothyronine) and T4 (thyroid hormone) levels are reduced in addition to a low thyrotropin level of 0.01 μIU/ml. The main manifestations are tiredness, mental weakness, slow heart rate, fatness and other symptoms, most of which are caused by pituitary pathology, such as hypopituitarism. It is recommended to consult a specialist for relevant examinations to identify the cause of the disease and follow the doctor’s instructions for treatment.