Protruding brain is caused by many reasons, need to go to a specialist hospital in time for diagnosis and treatment, to take different methods of treatment according to different causes. Causes of baby forehead protrusion: 1, intracranial hemorrhage or hypoxia ischemic encephalopathy: baby if there is intrauterine distress or hypoxic asphyxia before and after birth, resulting in damage to various organs of the baby, the brain is most sensitive to hypoxia, hypoxia can lead to acidosis, coupled with hypoxia can lead to brain edema and hemorrhage, hemorrhage and edema can lead to brain intracranial pressure increase, intracranial pressure increase can lead to baby brain gate protrusion. 2, encephalitis or meningitis: Infection in the baby’s womb or infection at or after birth can lead to pneumonia or sepsis in children, sepsis can lead to infection in the baby’s brain, leading to meningitis or encephalitis, which can lead to increased intracranial pressure, leading to protrusion of the baby’s cerebrum. 3, hydrocephalus: If the baby has intracranial hemorrhage or congenital abnormal brain development, it can lead to poor cerebrospinal fluid circulation in the brain and hydrocephalus, hydrocephalus can cause the baby’s brain gate to protrude. 4, brain tumor: brain tumor can lead to brain parenchyma pressure deformation, cerebrospinal fluid circulation disorders, resulting in the baby’s brain gate protrusion. In short, the baby is growing, usually must pay attention to the absorption of calcium and trace elements, supplement some calcium tablets and cod liver oil to strengthen the baby’s nutrition.