After standardized treatment, the prognosis of hypothyroidism is good and not serious; if not standardized treatment can induce serious complications, which are more serious in such cases. Patients with hypothyroidism have insufficient thyroid hormone levels, which can lead to a series of symptoms such as chills, bloating, constipation, bradycardia, and fatigue etc. However, the prognosis for hypothyroidism is better after taking levothyroxine sodium tablets to keep the thyroid hormone in a reasonable range, which is not considered to be serious. However, if the treatment is not standardized, hypothyroidism can lead to heart failure, mucous edema coma and other serious complications, which are more serious in such cases. Patients diagnosed with hypothyroidism should actively cooperate with their doctors in order to improve their prognosis.