Patients with hyponatremia are classified, assessed for risk, and treated: +Patients with mild hyponatremia (131 ≤ Na ≤134 mmol / l), mild clinical manifestations, no clinical adverse events and diabetes with poor blood sugar control, hypertension or fluctuating blood pressure, did not treat hyponatremia and continued to be monitored and corrected based on clinical status and subsequent blood sodium.