If the patient needs to undergo cranial decompression, it proves that the patient’s condition is relatively critical. After cranial decompression surgery, the patient may have sequelae, including: 1, cranial defects: since the decompression of the flap, it will certainly cause cranial defects. If the diameter of cranial defect is larger than 3cm, it is necessary to consider cranial defect repair at a later stage.2, cranial defect syndrome: some patients may have long-term dizziness, headache, local pain, throbbing sensation, psychological disorders and other manifestations after the surgery.3, prolonged coma: because of the heavy intracranial injury, if this kind of patient’s coma lasts more than 3 months, it is called a vegetative state of existence.