Mild hydrocephalus after rupture of intracranial aneurysm can be treated with dehydrating drugs, lumbar pool drainage, lateral ventricular drainage and other methods. 1. Dehydration drugs: For mild hydrocephalus that can be controlled by drugs (such as mannitol, furosemide, etc.), the hydrocephalus can be treated with drugs, and the treatment effect can be observed by regular review of CT. Drugs should be used under the guidance of a doctor. 2. Lumbar Pool Drainage: For patients with hydrocephalus that cannot be relieved by medication, continuous drainage of the lumbar pool can be chosen to improve the symptoms of hydrocephalus and improve the cerebrospinal fluid circulation at the same time. Regular rechecks of the cerebrospinal fluid routine and cerebrospinal fluid biochemistry are needed to prevent cerebrospinal fluid from being too high in protein and to prevent cerebrospinal fluid from affecting the cerebrospinal fluid circulation. 3. Lateral ventricular drainage: hydrocephalus that cannot be relieved by drugs can also be treated with lateral ventricular drainage. For patients who may have intracranial infection, lateral ventricular drainage can prevent retrograde infection that may be caused by lumbar pool drainage. It is recommended that patients with mild hydrocephalus from ruptured aneurysms actively cooperate with doctors for treatment, and most patients can get a better prognosis after treatment.