The skull is a relatively hard bone outside the brain that protects the internal tissues of the brain as well as the nerves, but it is still susceptible to cranial defects when injured by violent external forces, such as a traffic accident or a fall from a high speed. Surgery is an effective way to repair skull defects, not every patient will choose surgery, so what are the dangers of not repairing missing skull? 1.Re-bleeding If a patient produces a large skull defect and causes a secondary head injury during movement, the blood vessels inside the brain are prone to rupture due to trauma, so local bleeding leads to nausea, vomiting, dizziness and even coma, and skull repair surgery can reduce this risk. 2.Language and behavior disorders People will master various skills after birth through learning, such as speaking skills or writing skills, etc. Patients with cranial defects are prone to blood circulation problems inside the brain due to pressure, so they have learning disabilities, which are manifested as unclear spelling and trembling hands. 3.Psychological problems Most people have a complete skull covering their head. After the skull defect, patients will have psychological problems because of the collapse or expansion of the brain, such as low self-esteem because they feel different from normal people. If the psychological problems are not controlled in time, it is easy to develop into anxiety or depression. 4, personality changes The brain is a very precise system, once the brain of patients with skull defects is affected, it is easy to produce neurological problems, so it leads to personality changes, such as from a quiet personality becomes irritable, long-term fear or imaginary state, resulting in its inability to socialize normally. To sum up, if people develop brain problems, they must seek medical advice from a professional doctor and undergo surgery with skull repair material suitable for skull growth and development. Physical health is an important condition to ensure the quality of life, and every patient should pay active attention to their physical changes and address physical diseases as early as possible.