The natural course of subacute thyroiditis is about 2 weeks, but the recovery time for some patients may be extended accordingly depending on individual circumstances, treatment, etc. Subacute thyroiditis, or subacute thyroiditis, is an infectious disease that is self-limiting. It is easily triggered by respiratory viral infections. Patients often develop respiratory infections 1-2 weeks before the onset of the disease, after which they may develop cough, sputum, fever, malaise, and pain in the thyroid area, which may be localized to hard nodules. Patients with mild symptoms may be treated without medication and may gradually recover in 1-2 weeks through their own resistance, but are recurrent. For patients with severe symptoms, analgesic and anti-inflammatory drugs or non-steroidal drugs are required and the symptoms may be relieved. In addition, if the symptoms remain unrelieved, hormonal drugs can be used for a short period of time in a standardized manner, but must not be used for a long time. Patients are advised to take rest, eat a reasonable diet, eat more vegetables, fruits and protein-rich foods, and avoid spicy and stimulating foods as much as possible.