Patients with low potassium due to various reasons, after correcting the cause of low potassium or treating with potassium supplementation, the blood potassium can return to normal and the patient’s weakness symptoms can gradually recover, but the specific recovery time depends on the level of low potassium. Insufficient potassium intake, intracellular transfer of potassium from the body or excessive potassium excretion can lead to a blood potassium level below 3.5 mmol/L. Patients with low potassium may experience weakness, but if the cause of the disease is removed in a timely manner and the patient is treated with potassium supplementation, the blood potassium level can gradually rise to a normal level, the EMG of the patient can return to normal and the weakness can gradually recover. Usually, the symptoms can be relieved by taking oral potassium supplements for 1-2 days, or if the symptoms are more serious, direct intravenous potassium supplements can be used for a faster recovery. It is recommended that patients with low potassium should eat a diet rich in potassium, such as bananas, spinach, oranges and tangerines, and strengthen their nutrition to help their condition recover as soon as possible. It is important to avoid the triggers that lead to low potassium, such as overeating and drinking a lot of carbonated drinks.