Hypokalemia is one of the most common electrolyte disorders and can result in serious complications that can threaten the life of the patient. However, hypokalemia can be cured by aggressive potassium supplementation, which can gradually normalize blood potassium levels and relieve symptoms without affecting the patient’s life expectancy. Hypokalemia is common in patients with severe diarrhea, vomiting, inability to eat, and severe coma. Therefore, once the symptoms of hypokalemia appear, active potassium supplementation and treatment for the cause of the disease are usually curable, and timely treatment usually does not affect the patient’s life expectancy. However, if it is detected late or if the patient does not seek medical attention in time, it may lead to death in a short period of time if serious complications occur. In conclusion, hypokalemia is an endocrine emergency and needs to be treated actively with potassium repletion. In mild cases, food can be chosen to correct it, along with oral potassium chloride; in more severe cases, intravenous potassium repletion is required, and the rate of rehydration should be noted, and changes in blood potassium should be closely monitored. In addition, patients should pay attention to avoid triggers that lead to low potassium, such as overeating and drinking large amounts of carbonated beverages.