The common causes of headache plus vomiting are as follows: 1. It can be seen in hypertensive encephalopathy, where the headache accompanied by nausea and vomiting occurs due to the patient’s increased blood pressure stimulating the meninges, and the symptoms can be relieved after giving the patient antihypertensive treatment. 2. If no abnormality is found after head CT or MRI, oral ibuprofen, acetaminophen, sumatriptan, etc. can be given as treatment. 3. Headache plus vomiting can also be seen clinically in some patients with cerebral infarction and cerebral hemorrhage, and the patient can also have numbness, weakness and other neurological deficits of the limbs. 4. Headache plus vomiting can also be clinically seen in patients with craniocerebral trauma or cerebral contusion, and can be accompanied by transient amnesia, and patients are advised to rest in bed while applying drugs that promote neurological recovery.