The symptoms of subacute thyroiditis usually go away within 12 to 18 months. In some cases, however, hypothyroidism may end up being permanent. The American Thyroid Association estimates that approximately 5 percent of people with subacute thyroiditis develop permanent hypothyroidism.

How long does it take to recover from subacute thyroiditis?

People who develop subacute thyroiditis usually have symptoms for 1 to 3 months, but complete recovery of thyroid function can take up to 12 to 18 months.

Can subacute thyroiditis last for months?

The condition should improve on its own. But the illness may last for months. Long-term or severe complications do not often occur. The condition is not infectious.