The main treatment for geriatric hyponatremia is sodium supplementation. Instead of plain water, light saline can be given and supplemented with about 1000-1500 mL per day. 10% concentrated sodium chloride injection can also be supplemented with about 20-30 mL per day, and the following points should be noted in the process of sodium chloride supplementation. 1. The rate of sodium supplementation should not be too fast to avoid causing central pontine myelinolysis. This complication is a very serious disease that can cause death of the patient.2. The amount of sodium supplementation should not be too large to avoid heart failure, hypertension and hypertonic dehydration, especially in patients of advanced age, hypertension, coronary artery disease, cerebral infarction and other underlying diseases. 3. Glucose supplementation should be avoided, otherwise it will aggravate hyponatremia.4. If elderly patients with psychiatric symptoms appear, they should be given symptomatic treatment such as control of psychiatric symptoms.