The fastest way to treat the symptoms of hyperkalemia is through intravenous fluid supplementation containing potassium ions, and the primary disease causing the hyperkalemia should be treated aggressively. Hyperkalemia can be treated with oral potassium medications as well as intravenous potassium supplementation. Intravenous potassium supplementation is the most effective. However, intravenous potassium supplementation is prone to various complications, especially hyperkalemia caused by the rapid rate of potassium supplementation. Intravenous potassium supplementation requires the administration of large amounts of fluids at the same time, and since potassium ions are excreted in the urine, it is not possible to administer intravenous potassium supplementation if the urine output is too low. Intravenous potassium supplementation has strict limitations and needs to be done under the guidance of hospital doctors. At the same time, the primary disease causing hypokalemia should be actively treated.