Headache and nausea, if the symptom occurs suddenly, the patient is middle-aged or elderly, and there is a history of hypertension, it may be subarachnoid hemorrhage, and cranial CT should be examined in order to clarify the diagnosis. If subarachnoid hemorrhage is considered, the patient should be hospitalized in time for comprehensive treatment, including cranial pressure-lowering therapy, neuroprotective therapy, hemostatic therapy, and the patient should be instructed to be sedated, avoid excitement, and prevent constipation. If the patient has a past history of recurrent attacks, there is a possibility of cluster headache, which is a primary neurological and vascular headache. Patients mainly manifested as one side of the deep part of the eye, orbital, periorbital persistent swelling pain, pulling tearing pain, burning pain, patients generally headache duration ranging from 15-180min, can be suddenly stopped can be slowly relieved. Patients can have recurrent attacks, mainly symptomatic pain treatment, can use zolmitriptan and sumatriptan.