How long it takes for high cranial pressure to return to normal depends mainly on the cause of the increased intracranial pressure and the treatment measures. If the increased intracranial pressure is caused by traumatic brain injury, cerebral hemorrhage, brain tumor and hydrocephalus, craniotomy to remove the hematoma, remove the tumor, or perform shunt surgery for hydrocephalus can lead to a rapid decrease in intracranial pressure. The intracranial pressure usually returns to normal in about 2 weeks after the postoperative cerebral edema subsides. If the intracranial pressure is increased due to intracranial septic infection or diffuse brain injury, brain swelling, etc., craniotomy is not suitable, and the patient needs to take medications such as dehydrating agents to lower the intracranial pressure. The treatment period for patients is relatively long, and it usually takes about 1 month for the intracranial pressure to return to normal. Therefore, patients with increased intracranial pressure must go to the neurology department of the hospital in time for treatment, so as not to cause brain herniation leading to death.