Thyrotropin 0.001μIU/ml is lower than the normal level, it is recommended to consult a doctor in time to clarify the cause of the disease and then follow the doctor’s instructions for treatment. Treatment needs to be judged in conjunction with the rest of the examination, such as hyperthyroidism can be treated with drugs, iodine 131 or surgery, as follows: 1. Hyperthyroidism: If combined with high free thyroxine (FT4), hyperthyroidism is considered, and the patient will usually have symptoms such as emotional irritability, panic, hand tremor, weight loss, etc., and can be treated with antithyroid medication, iodine 131 or surgery. 2. Subclinical hyperthyroidism: If the combined free thyroxine (FT4) is normal, consider subclinical hyperthyroidism. If the patient does not have obvious symptoms (such as panic, hand tremor, emotional irritability, etc.), the patient may not need medication for the time being, and pay attention to regular monitoring of thyroid function and thyroid ultrasound. If there are symptoms mentioned above can be treated with anti-thyroid drugs. In conclusion, thyroid stimulating hormone 0.001μIU/ml, it is recommended to further consult the endocrinology department, pay attention to low iodine diet, eat non-iodized salt, try not to eat seafood.