The normal value of blood potassium concentration is between 3.5 and 5.3 mmol/L. Patients often sweat profusely and have diarrhea, all of which can lead to hypokalemia in the body. People who have been fasting, anorexic, or eating less for a long time can also develop hypokalemia, which can lead to other symptoms such as muscle weakness, episodic paralysis, memory loss, and disorientation. Hypokalemia can also lead to cardiovascular disease, with arrhythmias, heart rate block, atrial precontraction, and even atrial fibrillation and ventricular fibrillation, which can affect the patient’s life. Patients with chronic hypokalemia may have reduced kidney function, leading to metabolic hypokalemia, as well as reduced glucose tolerance, delayed growth in children, and reduced intestinal motility, leading to paralytic intestinal obstruction.