Hyperkalemia, also known as hyperkalemia, is characterized by symptoms such as weakness of limbs, numbness of hands and feet, muscle pain, nausea, vomiting, abdominal pain, slow heart rate, etc. In severe cases, quadriplegia, respiratory distress and cardiac arrest may occur. Hyperkalemia is defined as serum potassium higher than 5.5mmol/L. Causes of elevated blood potassium include reduction of renal potassium excretion (e.g. acute renal failure with oliguria or advanced stage, long-term use of potassium-preserving diuretic drugs such as amphotericin), intracellular migration of potassium ions (e.g. hemolysis, shock, burns, acidosis, etc.), input of too many potassium-containing medications, input of too much stocked blood, digitalis toxicity. Common symptoms of hyperkalemia include weakness of limbs, numbness of hands and feet, muscle pain, nausea, vomiting, abdominal pain, slow heart rate, etc. In severe cases, quadriplegia, respiratory distress and cardiac arrest may occur. When patients have the above symptoms and triggers causing elevated blood potassium, they should go to regular hospitals in time and receive reasonable treatments under the guidance of professional doctors in order to minimize the adverse effects of the disease.