Electrolytes in the cells play an osmotic role, electrolyte disorders should be promptly referred to a doctor to clarify which electrolyte caused the disorder and the development of the disease, and then proceed to treatment. Active treatment of the primary disease is the first task, eliminating the cause of the disorder is easy to correct, followed by replenishing blood volume and regulating electrolytes: I. Disorders of sodium metabolism 1. dehydration: active treatment of the primary disease, hypotonic dehydration intravenous infusion of salt-containing solution or hypertonic saline to correct the hypotonic state of extracellular fluid and replenish blood volume. Hypertonic dehydration control sodium intake, those who can eat drink water according to the amount of water loss, patients who cannot eat, intravenous infusion of glucose solution. Isotonic dehydration can be intravenous infusion of balanced salt solution or isotonic saline; 2. Water toxicity: patients drink a lot of water resulting in water toxicity, stop water intake in mild cases, and use diuretics to promote water elimination in severe cases. 2. Potassium metabolism disorders 1. Hypokalemia: actively deal with the primary disease, and treat potassium supplementation according to the degree of potassium deficiency. In mild cases, take dietary supplements or oral potassium supplementation drugs, slowly drip, and pay close attention; 2. Hyperkalemia: can lead to the risk of cardiac arrest, and should be treated actively, and immediately stop all potassium-containing drugs. Apply calcium gluconate solution by slow sedation, with fast onset but short duration. Diuretics can also be used to promote potassium excretion from the kidneys.