Patients with high blood potassium should go to the hospital as soon as possible to have the cause of the disease clarified, the level of blood potassium assessed under the guidance of a doctor, and be given medication to lower the potassium level and pay attention to cardioprotection. If the patient has renal insufficiency and the blood potassium is very high, hemodialysis can be chosen. 1. Pharmacological potassium-lowering: under the instruction of doctor, you can apply sodium polysulfonylstilbene, furosemide, sodium bicarbonate, glucose plus insulin, calcium gluconate and other medicines to lower the blood potassium level. 2. Dialysis: If the patient has renal insufficiency and the blood potassium has exceeded 6.5mmol/L, hemodialysis can be applied to reduce blood potassium rapidly. High blood potassium is called hyperkalemia, which can lead to cardiac arrhythmia, especially after the blood potassium exceeds 6.5mmol/L, it can lead to serious cardiac arrhythmia, and even cardiac arrest which is life-threatening. To summarize, if you find high blood potassium, you should go to the hospital as soon as possible and take potassium-reducing treatment under doctor’s guidance.