Patients who hit their heads and want to vomit may be related to increased intracranial pressure and plant nerve dysfunction, as follows: First, increased intracranial pressure: the impact caused by the patient’s brain hemorrhage, brain contusion, cerebral edema, etc. caused by increased intracranial pressure, increased intracranial pressure will compress the medullary vomiting center of the brainstem, causing stimulation and provocation of the vomiting center, thus causing nausea and vomiting. Second, the disorder of plant nerve function: the impact did not cause brain hemorrhage, only the concussion of brain tissue, but it will lead to brain cell dysfunction, especially will cause plant nerve dysfunction, causing nausea, vomiting. For patients with nausea and vomiting after hitting the head, they need to beware of the possibility of intracranial hemorrhage and should immediately go to the hospital to check the head CT in order to promptly detect intracranial hemorrhage after timely treatment. If there is intracranial hemorrhage, hospitalization is required for treatment, and surgery is also required for large amounts of bleeding.