The most important endocrine glands in human body are hypothalamus, pituitary gland (including adeno-pituitary and pituitary), thyroid, parathyroid, adrenal gland (including cortex and medulla), pancreas and gonads (including testes or ovaries). In addition to the above-mentioned endocrine glands, it has been discovered in recent years that organs and tissues such as thymus, pineal gland, gastrointestinal tract, kidney, anterior superficial glands, heart, lung and vascular endothelium can also secrete hormones and have endocrine functions. Endocrine diseases mainly include: a. Hypothalamic and pituitary diseases: such as pituitary tumors, gigantism, acromegaly, dwarfism, hypopituitarism, uremia and antidiuretic hormone disorder syndrome, etc. Thyroid disorders: such as hyperthyroidism, hypothyroidism, subacute thyroiditis, chronic lymphocytic thyroiditis, postpartum thyroiditis, simple goiter, nodular goiter, etc. Parathyroid gland diseases: such as hyperparathyroidism, hypoparathyroidism, etc. Adrenal gland diseases: such as Cushing’s syndrome, primary aldosteronism, pheochromocytoma, primary chronic hyperaldosteronism, also known as Addison’s disease, etc. V. Gonadal diseases: such as gonadal dysgenesis syndrome, precocious puberty, delayed puberty, hermaphroditism, infertility, cryptorchidism, testicular tumor, polycystic ovary syndrome, amenorrhea and lactation syndrome, menopause syndrome, etc. Sixth, endocrine hypertension: mainly for patients with hypertension causes to be investigated, etc. Metabolic diseases mainly include: diabetes, hypoglycemia, dyslipidemia, obesity, gout, osteoporosis, hypokalemia, hyponatremia, hyponatremia and other water, electrolyte and acid-base balance disorders.