Cranial repair surgery is a routine procedure in neurosurgery. There are many risk factors in life that may lead to cranial defects, no matter which cause is caused, it may bring life and health risks, so cranial bone repair needs to be performed in time. Some patients ask for precautions to be taken after cranial repair surgery, in fact, not only after surgery, but also before and during surgery. The first thing is to pay attention to safety after cranial defect caused by various reasons, we must avoid strenuous sports and bumps to avoid external injuries to brain tissues; secondly, if the symptoms of dysfunction caused by cranial injury, we should carry out medication or rehabilitation treatment in time; in addition, patients with cranial defect may be traumatized psychologically, we should pay attention to appropriate psychological guidance. The most important point is to pay attention to the timing of cranial repair. Under normal circumstances, cranial repair should be performed 2-3 months after the defect. Notes on repair surgery: The notes on repair surgery are mainly for doctors to focus on, while all patients and families have to do is to choose a good hospital and doctor. Our team is technically strong and clinically experienced in cranial repair plastic surgery, and we have performed hundreds of polyetheretherketone PEEK cranial repair surgeries. Moreover, the team is constantly improving and upgrading its technology, and now has four technological innovations. We pay special attention to the protection of the temporalis muscle during PEEK cranioplasty, the separation and repositioning of the various layers of tissue, and we also have a special design for the PEEK material. In addition to the conventional design based on the three-dimensional reconstruction of the patient’s head, we have personalized the material thickness and mesh aperture design to ensure tissue activity and prevent temporalis muscle atrophy, and also designed grooves in the material edges to facilitate lap fixation and prevent Scalp abrasion, etc. Post-operative precautions: After cranial repair surgery, like other surgical procedures, post-operative attention should be paid to preventing infection, changing medication on schedule, taking medication on time, removing stitches according to it and so on. After discharge from the hospital, pay attention to a balanced diet and nutrition, pay attention to rest and avoid overexertion. In addition, we should pay attention to protect the scalp, do not scratch it in the short term, and it is best not to wash the hair for two weeks to avoid infection. If problems arise, seek medical treatment in a timely manner and do not dispose of them without authorization.