Hashimoto’s thyroiditis is an autoimmune disease that usually has no significant impact on the life expectancy of the patient. Hashimoto’s thyroiditis, also known as chronic lymphocytic thyroiditis, is an autoimmune disease. In the early stages, it is only positive for anti-thyroid peroxidase antibodies, does not cause hypothyroidism, has no clinical symptoms, and has no effect on the patient’s life expectancy. With the prolongation of the disease, hypothyroidism may appear, with symptoms such as fear of cold, edema, reduced menstruation in women, and even amenorrhea, requiring oral treatment with levothyroxine sodium. If thyroid function can be maintained at normal levels, it usually does not cause serious complications and does not affect the patient’s life expectancy. Women planning pregnancy need to control TSH below 2.5mIU/L 3 months in advance, otherwise it may affect fetal mental development and motor coordination. Patients with Hashimoto’s thyroiditis need to have an iodine-restricted diet, avoid iodine oil contrast examinations, and pay attention to rest, avoid drinking alcohol, smoking, and staying up late at night, and have regular rechecking of thyroid function and thyroid ultrasound.