One of the causes of sluggish expression is hypothyroidism (hypothyroidism for short). Hypothyroidism is a disease in which the body’s metabolism is reduced due to a decrease in the synthesis and secretion of thyroid hormones or a lack of their physiological effects. It is not uncommon in clinical practice, and can occur at all ages, but is more common in middle-aged and elderly women, with a male to female ratio of 1:5. 1, there are endemic goiter, autoimmune diseases, thyroid surgery, radioactive iodine treatment for hyperthyroidism, and history of treatment with antithyroid drugs, thyroiditis or history of hypothalamic-pituitary disorders, etc. 2. Weakness, drowsiness, chilliness, less sweating, sluggish expression, mental weakness, memory loss, abdominal distension, constipation, low pronunciation, weight gain, and heavy menstrual bleeding. 3.Dry, yellow, thick and cold skin, non-depressed mucinous edema, dry, sparse hair, easy to fall out, low body temperature, slow pulse rate, small pulse pressure difference, enlarged heart, may have plasma cavity effusion, sluggish tendon reflex, yellow palm. 4.Severe cases may have mucinous edema coma, body temperature below 35℃, shallow and slow breathing, bradycardia, lower blood pressure, loss of reflexes, fuzzy consciousness and coma. 5.Basic metabolic rate is lower than normal, serum TT4 <40ng/mk, serum TT3 <0,6ng/mk, low thyroid uptake rate of 131I (3 hours <10%, 24 hours <15%).