In recent years, hydrocephalus has become a major threat to the health of the elderly, and it has caused great impact on their health and caused great distress in their lives. What causes hydrocephalus in the elderly and how to cure it? There are many factors that cause hydrocephalus in the elderly, the common ones are the following two: 1, congenital factors, part of the elderly hydrocephalus is long-term static, through clinical observation of hydrocephalus long-term are not any changes, called static hydrocephalus. Secondary factors, for example, some elderly people have cerebrospinal fluid circulation dysfunction due to tumor occupancy, so hydrocephalus is formed. Usually the tumor can be removed and the hydrocephalus can be treated. Other cases are caused by intracranial infection or traumatic brain injury resulting in craniotomy. Clinically, most elderly people with hydrocephalus belong to normal pressure hydrocephalus, which is a type of hydrocephalus. From the CT film, the dilatation of the ventricles can be seen, but the pressure measured by lumbar puncture is within the normal range. In most cases of hydrocephalus, after the ventricles are dilated, the lumbar puncture pressure is high, but it is within the normal range. After the onset of hydrocephalus, the patient usually shows the triad of symptoms: dementia, gait instability, and urinary incontinence. We would like to remind everyone that for hydrocephalus in the elderly, we must combine the actual situation of the patient to make a judgment, timely review of CT and lumbar puncture examination for a comprehensive analysis or judgment, perfect examination in order to finally clarify the cause of the patient, and take measures to target treatment. Lumbar pool shunt is a method of continuous shunting of cerebrospinal fluid out of the body through a special shunt tube placed in the lumbar pool at one end and the other end. It is a common way to treat hydrocephalus in the elderly and can also be used to treat lumbar arachnoid hemorrhage and intracranial infections. The procedure is less damaging to the brain. However, because the shunt is relatively slender and the shunt route is long, it can easily lead to shunt blockage or infection after surgery, and can even lead to retrograde infection into the skull, leading to septic intracranial infection and serious adverse consequences. Patients with infection after lumbar pool shunt may have systemic symptoms such as high fever, myalgias, and impaired consciousness, and in severe cases, drowsiness and coma may result. We have developed a set of specialized techniques for different types of hydrocephalus and postoperative complications, bringing new hope for patients with hydrocephalus.