As people’s standard of living and health requirements gradually improve, more and more people are more willing to spend on their own health, but not all diseases need to be treated. Hydrocephalus is a common disease in brain surgery, and most people know that once they have hydrocephalus, they need surgery, but the risk and cost of surgery is a pain in the hearts of many people. Today, I will explain to you that there is a category of hydrocephalus that actually does not require surgery or even medication, and once treated in an incorrect manner, it can affect the patient’s health and even endanger his or her life. There is a clinical category of hydrocephalus that belongs to relatively static hydrocephalus, that is, hydrocephalus that has developed to a certain degree basically in a state of no progress, or very slow progress. As we all know, hydrocephalus is actually a problem of cerebral crest fluid circulation, resulting in abnormal accumulation of fluid in the ventricles and subarachnoid space, and excessive cerebral crest fluid cannot be circulated and absorbed normally, thus compressing brain tissue and producing a series of clinical symptoms, which may cause disability and death in severe cases. Most of the relatively static hydrocephalus that we are talking about today are congenital, and for various reasons they are not cured at an early stage (family economic reasons, lack of parental attention, etc.), and some of them may die in their childhood due to the rapid progress of hydrocephalus, while some of the hydrocephalus is not treated, but eventually reaches a kind of equilibrium of its own due to the slow development. Some of these patients may have dementia, developmental delay, mental retardation, visual impairment, large head deformity, etc. due to the pressure on the brain tissue, while some may only have occasional headache symptoms and no other hindrance, and can get married and have children normally without much impact on their life. So for this type of hydrocephalus, is it necessary to treat it and when is it good to treat it? For this type of hydrocephalus, a detailed evaluation should be performed. If the symptoms of brain tissue compression are not obvious and do not have a great impact on life, it is recommended that observation can be done; because the ventricles of this type of hydrocephalus are generally large, if surgery is rushed, intracranial hemorrhage or even life threatening may occur after surgery. Does this type of hydrocephalus not need to be treated? No, this type of hydrocephalus requires dynamic observation. If a patient develops headache, vomiting, or unstable walking, he or she should be seen promptly to assess whether it is due to hydrocephalus. If surgical treatment is required, care must be taken not to proceed directly to surgery to prevent sudden postoperative pressure changes that could lead to intracranial hemorrhage and endanger life.