Disease analysis: potassium deficiency can be caused by many reasons, such as insufficient intake: anorexia, long-term fasting and so on. Increased excretion such as severe vomiting, diarrhea, potassium deficiency nephropathy, acute renal failure and polyuria, endocrine diseases such as primary aldosteronism and Kucushing syndrome, and metastatic hypokalemia such as periodic paralysis; There are also diseases such as diluted hypokalemia such as water poisoning or excessive water. Normal people will excrete potassium from urine even if they don't take in potassium from outside, which will lead to low potassium. Suggestion: If the patient can eat, and the low potassium is not serious, he can take potassium orally, eat foods rich in potassium, or potassium chloride. In severe cases, he can take potassium intravenously. Potassium supplementation should be used with caution in patients with renal insufficiency, anuria or oliguria. I wish you a speedy recovery.