Thyrography may cause some adverse effects in patients, but there is no such thing as a “thyrography hazard”. Thyrography is performed by inserting a cannula into the patient’s vein and injecting a contrast medium to visualize the shape of the thyroid gland and blood flow signals. During the process of thyroid imaging, patients may be allergic to the ultrasound contrast agent, and then have adverse reactions such as skin rashes and respiratory difficulties; in addition, the contrast agent needs to be metabolized by the kidneys, which may increase the burden on the kidneys, so you need to drink a lot of water to help dilute the contrast agent; however, all of the above are the possible adverse reactions that may occur during the process of thyroid imaging, and there is no such thing as “the danger of thyroid imaging”. There is no such thing as “the danger of thyroid imaging”. Patients who need to undergo thyroid imaging are advised to actively cooperate with the doctor’s operation, which can help avoid discomfort.