There are the following possible reasons for wanting to vomit and having headache: First, caused by intracranial lesions, common ones are intracranial infections, intracranial tumors, acute massive cerebral infarction, cerebral hemorrhage, etc. It is recommended that patients go to the hospital to improve CT or MRI examination to clarify the diagnosis. Second, caused by hypertension, diabetic ketoacidosis and other metabolic diseases, such patients with poor blood pressure and blood sugar control, caused by a dramatic increase in blood pressure and blood sugar, it is recommended that patients go to the endocrinology department for a clear diagnosis. Third, discomfort caused by severe cold, patients are advised to go to the hospital to improve the examination and give the corresponding antiviral drug treatment.