True hyperthyroidism and transient hyperthyroidism can be differentiated by the cause of the disease and the prognosis of treatment. The details are as follows: 1. Disease etiology: true hyperthyroidism is mostly caused by congenital genetic factors, autoimmune defects, and disorders of the body’s immune mechanism lead to abnormal thyroid function. While transient hyperthyroidism is often caused by viral infections, drugs, surgery, trauma and other triggers. 2. Treatment prognosis: true hyperthyroidism because of abnormal thyroid function, need to take anti-thyroid drugs, receive systematic anti-hyperthyroidism treatment, also feasible radioactive iodine and surgical treatment. Transient hyperthyroidism is usually caused by other primary diseases, usually after the primary disease is controlled and stabilized, transient hyperthyroidism can recover by itself. The differentiation between true hyperthyroidism and transient hyperthyroidism needs to be examined in a specialized hospital, judged by a professional physician, and treated according to the cause of the disease.