Serum sodium refers to the concentration of sodium ions in the serum. Reflecting increased serum sodium concentration, while the total amount of sodium in the body can be increased, normal, or decreased is important for maintaining extracellular fluid volume, regulating acid-base balance, maintaining normal osmotic pressure and cellular physiological functions, and is involved in maintaining normal neuromuscular stress. How to effectively prevent increased serum sodium? The following are preventive measures for increased serum sodium: Excess sodium is often complicated by other diseases, such as burns, craniocerebral injury, COPD, liver transplantation, hyperadrenocorticism, etc. Therefore, care should be taken to prevent electrolyte disturbances when treating these diseases. Patients with symptoms of this disease should be treated promptly to prevent further development and complications of more serious diseases. In the early stage, once hypernatremia is detected, all sodium-containing fluids should be stopped immediately and infused with hypotonic fluids instead; for those who cannot drink by mouth, a gastric tube can be left in place and warm water can be dripped continuously to relieve hypernatremia and promote sodium excretion; actively control infection and lower temperature; monitor blood glucose and actively control blood glucose to normal range; after the edema period, hypertonic diuretics can be stopped if the condition allows. Most patients can get better results with the above treatment, and can effectively prevent further development of the disease.