Hyperkalemia can present with weakness of the limbs, muscle aches, paralysis, dyspnea, and slowed heart rate. Hyperkalemia is managed by immediate cessation of potassium intake, use of medication to lower blood potassium, urgent counteracting of cardiac arrhythmia, and dialysis treatment if necessary. Mild elevation of blood potassium will affect the normal function of neuromuscular, resulting in weakness of limbs and muscle pain, and persistent elevation will result in muscle paralysis and even paralysis of respiratory muscles; high blood potassium will trigger symptoms of cardiac arrhythmia, with patients experiencing slow heart rate, conduction block, and in severe cases, ventricular fibrillation and sudden cardiac arrest. After hyperkalemia occurs, potassium intake should be stopped immediately, including food and drugs; as well as the use of drugs to reduce blood potassium, commonly used drugs include diuretics, insulin plus glucose, cation exchange resin; can also be used to combat arrhythmia, such as calcium gluconate. Dialysis is used when necessary. Patients with hyperkalemia may suffer from weakness of limbs in the early stage, but due to the symptoms are not typical enough, they are often neglected in the early stage. Therefore, patients who have been taking potassium-containing drugs orally for a long period of time should have their blood potassium tested regularly, and should seek for medical treatment in time if the above mentioned symptoms occur, so as to prevent serious consequences caused by excessively high blood potassium.