There are many reasons for migraine and vomiting in patients: 1. If the patient’s symptoms are considered to be caused by migraine, it is common that migraine belongs to vascular neuropathic headache, which mostly manifests as severe throbbing-like pain on one or both sides of the head, and when the headache is severe, it will stimulate the patient’s sympathetic nerve, which is prone to nausea, vomiting, and fear of sound and light stimulation. 2. If the patient does not have a history of migraine and the hemiplegic head pain persists, accompanied by nausea and vomiting, it may be caused by the patient’s increased intracranial pressure. It is likely to be caused by intracranial tumor or intracranial occupying disease, and it is necessary to improve head CT or head MRI examination to clarify.