Lack of potassium in the body may be caused by insufficient intake of potassium, excessive loss of potassium, or metastatic hypokalemia. 1. Insufficient intake of potassium: Everyone has different dietary habits, such as partiality, picky eating, anorexia or excessive weight loss, which leads to insufficient intake of various nutrients, such as potassium intake, which may lead to potassium deficiency. 2. Excessive loss of potassium: Causes of excessive loss of potassium mainly include gastrointestinal diseases causing massive vomiting and diarrhea; renal diseases, such as renal tubular acidosis, polyuria in acute renal failure; primary or secondary Cushing’s syndrome, aldosteronism, etc., which may lead to potassium deficiency. 3. Metastatic hypokalemia: hyperthyroidism hypokalemic cycle paralysis, alkalosis, etc., may lead to the transfer of potassium from the blood to the cells, resulting in potassium deficiency. It is suggested that patients with potassium deficiency should pay attention to their diet, and can be given foods with high potassium content, such as corn, leeks, soybean sprouts, etc. If necessary, oral potassium chloride delayed-release tablets or intravenous supplementation of potassium ions should be given, and the primary disease should also be treated symptomatically. When supplementing potassium, attention should be paid to see the urine to supplement potassium, the specific medication should be under the guidance of the doctor.