Hypothyroidism, referred to as hypothyroidism, is a group of symptoms caused by a lack of thyroid hormones in the blood due to various etiologies, resulting in a decrease in body metabolism. Hypothyroidism can occur at all ages, but is more common in older people and in women. Clinical hypothyroidism accounts for 2% and subclinical hypothyroidism accounts for 10%. What are the clinical manifestations and signs of hypothyroidism? There are fear of cold, less sweating, hoarseness, weight gain, enlarged thyroid gland, dull facial expression, slow reaction, puffy face, pale and cold skin, dry and thick flaking, keratinization of hair follicles, loss of outer 1/3 of eyebrow hair. EKG: low voltage, sinus bradycardia, pericardial effusion, etc. The diagnosis can be clarified by thyroid aspiration iodine 131 rate and thyroid hormone measurement. Several issues of hypothyroidism treatment: 1. Supplemental thyroid tablets or thyroxine tablets. Pay attention to start with small doses and slowly increase the dosage, taking TSH as the indicator. 2, Chinese medicine diagnosis and treatment can significantly` improve the clinical symptoms and quality of life of patients.