Eight major complications can occur after pituitary tumor surgery, including hormonal imbalance, hydrocephalus, cerebrospinal fluid nasal leakage, and other complications, as follows: 1. Hormonal imbalance: manifested as hormone deficiency; 2. Secondary empty saddle syndrome: manifested as visual impairment. Due to the postoperative effect on the visual cross, the patient’s vision is impaired; 3, hydrocephalus: due to the appearance of hydrocephalus after surgery, the patient may experience changes in consciousness and even coma; 4, intracranial infection: including tumors of the pituitary gland, intracranial inflammation, meningitis, etc.; 5, cerebrospinal fluid nasal leakage: patients undergoing transnasal surgery may experience rupture of the dura in the surgical area and damage to the dura or arachnoid, resulting in Cerebrospinal fluid may flow out from the nasal cavity, resulting in cerebrospinal fluid nasal leakage; 6. Internal carotid artery injury: injury to the internal carotid artery may occur during surgery, resulting in internal carotid artery bleeding, or intraoperative injury may cause pseudoaneurysm rupture of the internal carotid artery, resulting in postoperative nasal bleeding; 7. : Transnasal surgery may damage the nasal septum, causing postoperative nasal septal perforation in patients. The postoperative complications of pituitary tumor should be taken seriously and active measures should be taken once abnormalities occur to avoid adverse consequences.