Survival of hypothyroidism patients is related to the early detection and treatment of the disease. If hypothyroidism is detected at an early stage and treated promptly and effectively, the life expectancy of patients is usually not affected. Hypothyroidism is a common endocrine disease, which is a decrease in body metabolism caused by insufficient thyroid hormones. There is no specific treatment, and most patients rely on thyroid hormone supplementation to keep their thyroid hormone levels within normal limits. If the patient’s condition is mild and he or she can follow the doctor’s instructions and take medication regularly, the patient’s life expectancy can be the same as that of a normal person. On the contrary, if the condition of hypothyroidism patients is more serious, or the compliance is poor, it is easy to lead to thyroid crisis, and even endanger the patient’s life, but there is no clear clinical data on how long they can live. Patients with hypothyroidism should pay attention to reasonable, regular, lifelong medication, and avoid eating foods or drugs with high iodine content.