Salt deficiency generally refers to sodium deficiency, and sodium deficiency in an eighty year old will result in abnormal functioning of the nerves, muscles, and multiple organ systems, decreased osmolality, and an imbalance in acid-base balance. Elderly people may experience peripheral weakness, dizziness, and numbness of the hands and feet in mild sodium deficiency. When the body’s sodium ions are further reduced, nausea, blurred vision, vomiting, as well as rapid heartbeat, blood pressure instability and other symptoms, a small number of patients will appear to reduce the amount of urine, blood pressure, pulse pressure difference, and in serious cases, shock may occur. Elderly people have serious aging of the body, the body’s compensatory capacity decreases, the body lack of sodium after the symptoms, to be more serious than young people. The above symptoms, go to the hospital in time for relevant examination, under the guidance of the doctor for treatment.