It is not absolutely impossible to do enhanced CT for mild hyperthyroidism, but enhanced CT is not recommended for hyperthyroidism patients with poorly controlled conditions. Enhanced CT is to inject iodine-containing contrast agent into the suspicious area on the basis of CT scanning, and then carry out targeted examination on it, thus improving the accuracy of diagnosis. Although intravenous contrast is non-toxic, the contrast agent contains a certain amount of iodine, which is one of the raw materials for synthesizing thyroid hormones, and the injection of iodine-containing contrast agent may exacerbate the condition of hyperthyroidism, which is not conducive to controlling the condition of hyperthyroidism patients. Besides, it is not recommended in cases of allergy to iodine, severe liver and kidney dysfunction, and myasthenia gravis. Patients with mild hyperthyroidism who need to undergo enhanced CT should decide whether to undergo enhanced CT after their thyroid hormones are under reasonable control and after consulting with a medical professional.