Electrolyte disorders in the elderly can be categorized as sodium, potassium, and calcium ion disorders with varying symptoms. They mainly include muscle weakness, palpitations, twitching of hands and feet, and fatigue. 1. Sodium ion disorder: patients with hyponatremia will have fatigue, weakness, dizziness, blurred vision, mental abnormality and other manifestations. When the patient has severe sodium deficiency, confusion, muscle twitching, dyspnea, coma and even hypovolemic shock may occur. Hypernatremia will often appear dizziness, headache, limb muscle spasm and other symptoms. 2. Potassium ion disorder: hyperkalemia patients mainly manifested as muscle tremor, abnormal sensation of hands and feet, weakness of limbs, muscle paralysis, etc., which can cause cardiac arrest in severe cases; hypokalemia mainly manifested as various kinds of muscle weakness, for example, limb weakness, paralysis caused by skeletal muscle weakness, respiratory muscle weakness, etc., and smooth muscle weakness can lead to paralytic intestinal obstruction, which can be manifested as nausea, vomiting, abdominal distension, and loss of intestinal peristalsis. 3. Calcium ion disorders: hypocalcemia patients mainly manifested as perioral or fingertip numbness or pins and needles sensation, limb twitching, and in severe cases, it can also lead to respiratory distress or even apnea due to tracheal spasm; hypercalcemia patients can have symptoms such as fatigue and weakness, mental laxity, depression and insomnia, and muscular weakness. Electrolyte disorders are often secondary to other serious diseases, and improper treatment may lead to serious consequences. It is recommended that patients go to the hospital as soon as possible to clarify the specific cause of the disease and receive timely treatment.