The main treatment for low potassium in nephrotic syndrome is potassium supplementation, which can be done in the following two ways: oral potassium supplementation and intravenous potassium supplementation. Oral potassium supplementation is safer and there is usually no problem of overdose, but it is relatively poorly absorbed, the amount of supplementation is not easy to grasp, and it may cause irritation to the gastrointestinal tract. Intravenous potassium supplementation requires a potassium ion concentration of less than 0.3%, and the total amount and rate of daily potassium supplementation should be controlled within the appropriate range. It has the advantage of rapid potassium supplementation, which can adjust hypokalemia as soon as possible. In addition to the above, care should be taken not to use highly effective potassium-depleting diuretics, such as torasemide, in the course of medication to improve swelling in nephrotic syndrome, which is one of the considerations in the management of hyperkalemia.