Intracranial infection is a disease caused by various pathogens invading the brain parenchyma and meninges, and can be caused by viral infection, bacterial infection, and other factors such as fungal infection. All in all, the cause of intracranial infection must be clarified, and then timely targeted treatment measures can be taken to help restore health as soon as possible. In recent years, many patients with intracranial infections in the clinic are caused by intracranial infections after some surgical procedures, and the chance of intracranial infections after hydrocephalus surgery is great, which is mainly related to traditional shunts and the local medical level. Infections may occur after traditional shunts, as well as problems such as blocked shunts, which greatly increases the risk. Combined with the lack of medical knowledge of patients, many patients seek medical treatment around being misdiagnosed and mistreated, not only seeing no hope for recovery, but also delaying treatment, resulting in the deterioration of the condition once. Here is a reminder that intracranial infections may show symptoms such as fever, general malaise, drowsiness, limb aches and pains in the early stage, and in severe cases, patients may have convulsions, aphasia, mental abnormalities, mental retardation, hemiplegia, or even coma. Of course, the diagnosis of intracranial infection cannot be confirmed by symptoms alone, and further diagnosis is needed in combination with cerebrospinal fluid bacterial culture. Clinical diagnostic criteria for intracranial infection are as follows: 1. Clinical symptoms and signs of intracranial infection such as high fever, headache, neck ankylosis, etc.; 2. WBC>0.01X109/L in cerebrospinal fluid examination, with an increase in polymorphonuclear cells as the main cause. Sugar <2.25mmol/L, chloride <120mmol>0.45g/L; 3, positive results of cerebrospinal fluid bacterial culture; 4, there is a definite cause of infection, such as cerebrospinal fluid leakage. Anyone with article 3 can confirm the diagnosis, such as a negative bacterial culture of cerebrospinal fluid requires a combination of the remaining articles. If there are related patients at home, it is recommended to go to a regular large hospital for careful examination and precise diagnosis.