The number of days an elderly person can live with hallucinations and gibberish depends on the condition. It is commonly caused by the following diseases: First, cerebrovascular disease, depending on the area of cerebral infarction or cerebral hemorrhage, if the infarction or hemorrhage of the brain stem is more serious, the survival time may be shorter. If this symptom is caused by brain atrophy, it may be able to survive for a long time. Second, pulmonary encephalopathy caused by chronic obstructive pulmonary disease, if actively treated with mechanical ventilation, anti-inflammatory, asthma, phlegm and other drugs, the patient can survive for a period of time. Third, hyponatremic encephalopathy, which can cause such hallucinations and gibberish, can be treated with intravenous sodium supplementation, and patients can generally return to normal and survive for a long time. Four, diabetes complications of this hypoglycemic reaction, can appear hallucinations nonsense symptoms, after intravenous glucose drip treatment, blood sugar back to normal, the patient can survive for a long time.