Today, with the high prevalence of various diseases, it poses a great threat to people’s health. Hydrocephalus is one of the diseases that are of great concern today. Neurosurgeons remind that hydrocephalus can cause serious damage to patients if it is not taken seriously in the early stages and allowed to develop unchecked, so it is important for patients to be vigilant in their daily lives. Among the types of hydrocephalus, there is a very common type called obstructive hydrocephalus, the symptoms of which vary greatly among people of different ages. The clinical manifestations of infants and children with obstructive hydrocephalus are generally the “sunset sign”, increased head circumference, difficulty in sucking and eating, visual and intellectual developmental impairment, and even drowsy convulsions. In adults with obstructive hydrocephalus, headache, dizziness, loss of vision, and weakness of the lower limbs may occur. Why do you get obstructive hydrocephalus? There are many causes of obstructive hydrocephalus, which can be summarized as follows: 1. congenital malformations: the more common malformations include spina bifida and midbrain aqueduct stenosis, which may be related to the mother taking certain drugs during pregnancy, abnormal fetal position and excessive amniotic fluid. 2, infection: septic meningitis, tuberculous meningitis, ventriculitis, etc. block the circulatory channels of cerebrospinal fluid, especially in the fourth ventricle and subarachnoid space at the base of the brain causing hydrocephalus. 3, hemorrhage Intracranial hemorrhage after fibrous tissue hyperplasia causes hydrocephalus, and malabsorption of intracranial hemorrhage after birth is also a common cause of hydrocephalus in newborns, which is often neglected. In addition, after traumatic brain injury, subarachnoid hemorrhage can cause arachnoid adhesions and hydrocephalus to occur. 4.Tumor Intracranial tumor can block any part of the cerebrospinal fluid circulation pathway. It is more common in the vicinity of the fourth ventricle. Treatment options for obstructive hydrocephalus are divided into conservative treatment and surgical treatment. For some mild cases of obstruction, conservative treatment can be used to further control the condition, followed by regular observation and, if necessary, surgery can be considered. In the case of severe obstruction, surgery is required, otherwise it may lead to life-threatening brain herniation.