Hypokalemia refers to a blood potassium level below 3.5mmol/L. Clinically, it is mainly diagnosed through electrolyte tests and arterial blood gas analysis, which can confirm whether a patient has low potassium. After developing hypokalemia, patients may experience symptoms such as fatigue and limb weakness. At this point, treatment should include the oral administration of sustained-release potassium chloride tablets or intravenous infusion of potassium chloride, as well as advising the patient to consume potassium-rich vegetables and fruits to correct hypokalemia. Prolonged hypokalemia can lead to arrhythmia and even endanger the patient’s life. (Medications should be used under the guidance of a clinical doctor, according to the specific situation.)