The surgical approach for low-grade gliomas is usually craniotomy. Complications such as rise in intracranial pressure, intracranial hematoma, infection and pneumothorax can occur after surgery. 1. Rise of intracranial pressure: rise of intracranial pressure after craniotomy can make the patient’s cerebral perfusion pressure drop, which can affect cerebral metabolism in severe cases, and once cerebral hernia occurs, the patient’s life can be in danger. The causes of rising intracranial pressure include postoperative cerebral hematoma, obstruction of venous return, hydrocephalus, cerebral edema and so on. 2. Postoperative hematoma after craniotomy: it is a serious complication of surgery. Failure to detect or treat it in time will be extremely unfavorable to the patient’s postoperative recovery, and may even endanger the patient’s life. The main causes are incomplete hemostasis, abnormal coagulation, and improper hemostatic techniques. 3. Gas cranium: air enters the cranial cavity after opening the dura mater and arachnoid membrane in craniotomy, and the closure of the dura mater and subarachnoid space will cause a certain amount of gas to accumulate in the cranial cavity. Generally, a small amount of gas accumulation will be shown on CT, but it rarely causes brain displacement. The gas can disappear on its own a few days after the operation, and generally will not aggravate the condition. 4. Infection: It is divided into direct infection and indirect infection. Direct infections include scalp incision infections, meningitis, brain abscesses, etc. Indirect infections include urinary system infections, respiratory system infections and so on. For those who have complications after surgery, they should go to the relevant departments of regular hospitals in time, and be treated under the guidance of professional physicians to avoid delaying the condition.