Hypokalemia does not usually recover on its own and requires active treatment. Hypokalemia is a relatively common electrolyte disorder. There are many reasons for low blood potassium, mainly including insufficient intake of potassium, excessive discharge of potassium and abnormal transportation of potassium. Inadequate intake is mainly reflected in dietary abnormalities. Generally, the law of potassium in the body is to eat more and excrete more, not to eat and excrete more. If the consumption is too small and potassium excretion persists, it will cause hypokalemia, especially in some patients with single diet, malnutrition and long-term dieting. Potassium is excreted in a variety of ways, including sweat, urine, and the digestive tract, and is commonly seen in patients with nausea, vomiting, and diarrhea, as well as in certain renal and endocrine diseases. Abnormalities in potassium transport mainly involve extracellular potassium transport to intracellular, e.g. metabolic alkalosis or acidosis during recovery, high glucose solution and insulin input at the same time. Low blood potassium can be properly consumed potassium-containing foods, such as potatoes, spinach, yam, hairy beans, carrots, mushrooms, lamb, oranges, etc., and can also be supplemented by medication if necessary, but it is more important to find out the cause, make a good differential diagnosis, and treat the cause.