The symptoms of vomiting when headache occurs are considered to have three causes: First, the patient may have chronic elevated intracranial pressure. It is recommended that the patient have a CT head examination to observe whether the patient has intracranial occupying disease or hydrocephalus, or some patients have cerebrovascular disease, such as venous sinus thrombosis. In the second aspect, consider that the patient may be caused by migraine. The patient may have migraine symptoms induced by excessive mental tension or overexertion and little sleep, and the patient may have headache, nausea and vomiting. The third aspect is that the patient may have glaucoma. When the eye pressure of acute glaucoma is elevated, the patient will have headache and will also have nausea and vomiting.