For example, the skull is an important part of the human skeletal tissue, which protects the soft tissues of the brain and maintains a stable intracranial pressure and intracranial environment. However, many people have cranial defects due to accidents, which should not be taken lightly. Cranial defect is a routine surgery in neurosurgery, which is relatively mature, so patients do not need to worry about the risk, but more attention should be paid to the cranial repair material, because the good or bad repair material directly affects the effect after surgery. At present, titanium mesh material is widely used in the clinic, but there are some unavoidable problems with titanium mesh material, such as higher chance of infection and scalp abrasion after surgery, patients can have cutting pain, sensitivity to external hot and cold environment after surgery, and even some patients have scalp bulge or exposed titanium mesh material on titanium mesh for skull repair after surgery. What about scalp bulging on titanium mesh for skull repair? There are two factors, one may be a lesion under the patient’s scalp, the other may be a deformation of the titanium mesh material, etc., the specific diagnosis and assessment should be made by the doctor, and if necessary, the titanium mesh material should be removed and re-scheduled for surgery.