A cold alone does not usually result in an enriched thyroid blood flow, but subacute thyroiditis can present with cold symptoms, which can be followed by an enriched thyroid blood flow.
The concept of an enriched thyroid blood flow, usually on ultrasound imaging, shows an enhanced signal of blood flow within the thyroid gland, which can appear as a sea of fire sign on ultrasound. This condition is commonly associated with hyperthyroidism. In hyperthyroidism, the thyroid gland synthesizes increased amounts of thyroxine, and the metabolism is so vigorous that it requires a greater blood supply, and this can be manifested by increased blood flow to the thyroid gland.
A cold alone does not cause an abundance of blood flow to the thyroid. However, subacute thyroiditis can be caused by a viral infection, which may be preceded by cold symptoms such as fever and sore throat, and may result in an increase in thyroid blood flow after the disease has progressed to a certain stage.
Patients with colds with abundant thyroid blood flow are advised to go to the hospital and ask the doctor to make a judgment based on the patient’s specific situation, and if necessary, need to be treated under the guidance of the doctor.