Hyperkalemia is hypokalemia. Hyperthyroidism leading to hyperkalemia can usually be cured by actively treating the primary disease. Hyperthyroidism leading to hyperkalemia is usually caused by the inward flow of potassium ions. This condition requires active treatment of the primary disease and potassium supplementation therapy, and the blood potassium level of most patients can be restored to the normal level, therefore, hyperthyroidism leading to hyperkalemia can be cured. Hyperthyroidism leading to hyperkalemia needs active treatment of hyperthyroidism, and the common methods of treating hyperthyroidism include medication, iodine 131 treatment and surgery, etc. The medication includes prothiouracil, methimazole, etc. Besides, iodine 131 treatment and surgery can be chosen according to the condition. Pay attention to the treatment of hyperthyroidism at the same time also need to carry out potassium supplementation treatment, often use drugs for potassium supplementation, such as potassium chloride, potassium citrate, potassium glutamate and so on. Patients with hyperthyroidism leading to hyperkalemia need to be actively treated under the guidance of doctors, and generally have a good prognosis.