Persistent sodium excretion in urine belongs to abnormal antidiuretic hormone secretion syndrome is a syndrome in which antidiuretic hormone is still continuously secreted when plasma osmotic concentration and blood sodium are normal or low, resulting in a series of clinical manifestations such as reduced free water clearance, water retention, hyponatremia, and low osmolar blood pressure. Common dietary care includes the following: 1. More potassium-rich foods: such as green beans, peas, fava beans, red beans, soybeans, shiitake mushrooms, flower mushrooms, straw mushrooms, yellow cauliflower, purple cabbage, kelp, dried shellfish, shrimp, bananas, peanuts, etc. This can prevent or treat some side effects due to electrolyte disorders caused by diuretics. 2, prohibit the consumption of nitrite-containing diet: such as pickled vegetables, rich in nitrite, can reduce the function of the blood vessel wall, but also induce the occurrence of neoplastic diseases, so it is very unfavorable to the patients with this disease to eat. Such as kimchi, rich in nitrite, especially the concoction time of less than 1 week of vegetables, also has a direct inhibitory effect on the gland, is also not conducive to the consumption of patients with this disease. It is advisable to eat fresh vegetables 3. Diet should be light: give sufficient calories to save protein utilization, thus reducing the burden on the kidneys; supplement with sufficient vitamins to regulate the acid-base balance in the body. Increase the amount of water intake and pay attention to rest. Eat more foods rich in vitamin B complex and minerals. SIADH is a syndrome in which the secretion of antidiuretic hormone (ADH) is not regulated by plasma osmolality and increases abnormally, resulting in water retention, increased urinary sodium excretion, and dilutional hyponatremia. It is a syndrome with a series of clinical manifestations.