The causes of hypothyroidism are different, and so are the treatments. The causes and treatments of hypothyroidism are as follows. 1. Autoimmune damage: the most common cause is autoimmune thyroiditis, such as Hashimoto’s thyroiditis, etc. For autoimmune thyroiditis, there is no effective treatment for the cause of the disease, and thyroid hormone replacement therapy should be used, and levothyroxine sodium tablets are usually given to treat the condition, and if the goiter is accompanied by persistent pain, and the medication is ineffective, then it can be treated with surgery. 2. Thyroid destruction: Surgery, iodine 131 treatment, subtotal thyroidectomy, leading to destruction of thyroid tissue, thyroid hormone synthesis and secretion is reduced, causing hypothyroidism, and generally require lifelong thyroid hormone replacement therapy. 3. Antithyroid drugs: If the drugs used to treat hyperthyroidism, such as methimazole and propylthiouracil, are overdosed, resulting in drug-induced hypothyroidism, it can usually be treated by stopping the drug or reducing the dose. There are other causes of hypothyroidism, if you suspect hypothyroidism, it is recommended to consult a doctor in time, under the guidance of a doctor to clarify the cause of the disease and standardized treatment.