Hyperkalemia is also known as hypokalemia. Hyperkalemia does not usually occur if there are no factors that cause hyperkalemia, so there is no such thing as “how often does hyperkalemia occur”. Hypokalemia is a pathological condition in which serum potassium is lower than the normal physiological minimum concentration. The normal concentration of potassium in the blood is 3.5~5.5mmol/L, and in hypokalemia, serum potassium is lower than 3.5mmol/L. The causes of hypokalemia are potassium intake, potassium intake, potassium intake, potassium intake and potassium intake. The causes of hyperkalemia include reduced potassium intake and excessive potassium loss; reduced potassium intake can be seen in anorexia, weight loss, etc.; excessive potassium loss can be seen in vomiting, diarrhea, acute renal failure with polyuria, etc. In addition to this, hyperkalemia can be caused by hypokalemic periodic paralysis, water intoxication and other conditions. Therefore, hypokalemia does not occur in the absence of factors that cause hypokalemia. Patients with hyperkalemia should actively cooperate with doctors for treatment.