Patients with hypokalemia can recover after treatment to correct their blood potassium levels. In mild cases, 1-2 days of oral potassium supplementation is usually sufficient, but in severe cases, intravenous potassium chloride drips are required to relieve symptoms. Patients with different severity of hypokalemia need different treatment methods. Patients with mild hypokalemia can take oral potassium chloride extended-release tablets for potassium supplementation, and the blood potassium level will return to normal after 1-2 days, and the corresponding symptoms will be restored. However, for patients with severe hypokalemia, potassium supplementation is needed as soon as possible. Oral potassium chloride is less efficiently absorbed through the gastrointestinal mucosa and may even be life-threatening, so intravenous potassium supplementation is recommended to save the patient’s life. At the same time, the cause of the hypokalemia should be treated, otherwise potassium supplementation is not effective and is prone to relapse. In chronic hypokalemia, until the cause of the disease is eliminated, potassium supplementation should be administered on a long-term basis and in appropriate amounts during regular electrolyte monitoring. In addition, the patient’s daily diet should be enriched with potassium-rich foods such as bananas and spinach, as well as enhanced nutrition.