Cerebrovascular accidents, intracranial space-occupying lesions, hypertension, upper respiratory tract infections and other diseases should be considered for headache and vomiting. 1. Cerebrovascular accident: such as cerebral hemorrhage, cerebral infarction and other diseases can cause increased intracranial pressure, resulting in severe head pain, projectile vomiting, retinal edema and other symptoms, this situation requires timely medical attention, otherwise it will be life-threatening. 2. Intracranial space-occupying lesions: Intracranial space-occupying lesions can compress the vascular brain tissue and cause brain dysfunction, resulting in progressive aggravation of headache symptoms, as well as projectile vomiting and other clinical manifestations. 3. Hypertension: patients with poorly controlled blood pressure can cause cerebral vasospasm, resulting in cerebral vasodilatation headache, thus showing clinical manifestations such as headache and vomiting, and the symptoms can be improved after controlling blood pressure. 4. Upper respiratory tract infection: cold and flu patients can also cause headache and vomiting clinical manifestations, often accompanied by sneezing, sore throat, runny nose and other cold symptoms. Therefore, the cause of headache and vomiting is very complex, which needs to be combined with the patient’s accompanying symptoms for differential diagnosis to clarify the cause of the disease, so that under the guidance of the doctor, systematic treatment.