Most hypothyroidism caused by subacute thyroiditis recovers after 6 to 8 weeks, and very few develop permanent hypothyroidism that requires lifelong medication. Subacute thyroiditis, the most common painful thyroid disorder, is a self-limiting thyroid inflammation associated with viral infection that is curable in the vast majority of cases. The onset of goiter can last 4 to 6 weeks, and some patients may experience persistent pain. After the inflammation resolves, some patients may develop transient hypothyroidism, which usually lasts 6 to 8 weeks and then resolves. Very few patients will develop permanent hypothyroidism, with manifestations such as apathy, lethargy, skin edema, etc. At this time, lifelong medication is required, and the commonly used medication is levothyroxine. Hypothyroidism caused by subluxation should be treated under the guidance of a doctor.