Thyroiditis is generally divided into two categories: subacute thyroiditis and chronic lymphocytic thyroiditis, also known as Hashimoto thyroiditis. Subacute thyroiditis is generally characterized by sudden swelling, stiffness, dysphagia and pain of the thyroid gland, and patients may also have fever and accelerated ESR. Treatment is generally based on hormone therapy, which may lead to hypothyroidism, so it is necessary to cooperate with the treatment of thyroxine tablets. Generally speaking, the prognosis is that thyroid function does not decline, the prognosis is good, and antibiotic treatment is ineffective. Chronic lymphocytic thyroiditis, also known as Hashimoto's goiter, is an autoimmune disease, usually accompanied by hypothyroidism, but its manifestations have certain regularity. Hyperthyroidism may occur in the early stage, and hypothyroidism may occur in the later stage. It is necessary to review thyroid function regularly and adjust medication and dosage according to thyroid function. Therefore, if the above two kinds of thyroiditis occur, it must be treated in time and the prognosis is good. In addition, the treatment of these two kinds of thyroiditis is not exactly the same, and it is better to make a clear diagnosis, and only a clear diagnosis can be treated. There are different types of thyroiditis, one is subacute thyroiditis, which is caused by virus infection in the early stage, resulting in a large amount of thyroxine released into the blood temporarily. The early manifestations are hyperthyroidism, palpitation, hyperhidrosis and emaciation. With the increase of metabolism, thyroxine is gradually metabolized and thyroid function returns to normal. In this case, subacute thyroiditis can heal itself. The clinical manifestations were normal thyroid function and normal erythrocyte sedimentation rate, and the clinical manifestations of the patients disappeared. After a period of time, some patients with subacute thyroiditis will have symptoms of hypothyroidism. Because virus infection causes irreversible damage to thyroxine, the body produces insufficient thyroxine, which leads to hypothyroidism. There is no cure for this condition. Thyroid hormone tablets should be used instead of lifelong treatment. Hashimoto thyroiditis is also called chronic lymphocytic thyroiditis. It may be that thyroid antibody is increased, but thyroid function T3, T4 and TSH are normal. In this case, medication is not needed, and thyroid antibodies are unlikely to return to normal. In this case, most of them do not need treatment. Of course, some patients may have heard on the Internet that eating foods containing selenium can lower thyroid antibodies. After eating for half a year to a year, some patients' antibodies will drop, and some patients' antibodies will not change, so they don't have to continue to eat selenium-containing preparations.