Elevated serum thyrotropin and normal values may indicate subclinical hypothyroidism. If thyrotropin is greater than or equal to 10 mIU/L, treatment with levothyroxine may be indicated. In subclinical hypothyroidism, there are no obvious clinical signs and symptoms, and laboratory tests often indicate that serum thyrotropin is elevated, while other values, such as free thyroxine, are normal. Common causes include Hashimoto’s thyroiditis and thyroid damage caused by long-term use of antithyroid drugs. When a diagnosis of the disease is made, treatment is usually based on the specific thyroid stimulating hormone value and the presence or absence of comorbidities. If the physical examination reveals abnormal thyroid hormone function test, it is recommended to go to a regular hospital to avoid delaying the condition.