Subthyroiditis that is subacute thyroiditis, taking prednisone how long effective this is not fixed time, generally prednisone 20 ~ 40mg / d, to relieve symptoms, but the hormone does not shorten the course of its disease, so the symptoms of a remission, you can reduce the amount of maintenance (10 ~ 20mg / d, 4 ~ 6 weeks). There are individual differences in the same disease, each person has different sensitivity to drugs, and it is not possible to generalize. Specific medication and dosage should follow the doctor’s instructions. Subacute thyroiditis is a kind of self-limiting thyroiditis, most of which can be cured by themselves. The clinical symptoms of the disease are fever, muscle pain, tachycardia, and excessive sweating. Physical examination may show an enlarged thyroid gland. Subacute thyroiditis is a self-limiting disease, mild cases generally do not need to take prednisone tablets, for moderate to severe patients can be oral prednisone tablets, generally after the use of the drug discomfort symptoms gradually relieved, after the symptoms are relieved to reduce the amount of maintenance for 1 to 2 months. However, it can not be generalized, the specific needs to be combined with clinical symptoms and conditions to adjust the time and dosage of medication. If you are suffering from diabetes, as well as peptic ulcers need to be used with caution, the drug is prohibited for those who are allergic to the drug. The subacute thyroiditis should be timely to the hospital, follow the doctor’s instructions standardized treatment, and maintain a healthy lifestyle. The above drugs should be used under the guidance of a doctor.