Patients often feel headache, nausea may be due to the following reasons: 1. Consider that it is caused by vegetative nerve dysfunction and cerebral nerve disorder. If the patient often sleeps poorly, stays up late, lack of sleep or mental stress is relatively high, anxiety, tension, which can easily lead to headache and nausea symptoms, all have obvious triggers.2. If the patient often attacks headache and nausea may be caused by functional headache, such as common migraine, myotonic headache, neurological headache and so on. The above types of headache have no clear organic lesions by doing head CT and head nuclear magnetic examination.3. If the patient has frequent headache and nausea and gradually progresses and aggravates, it may be caused by brain tumors and brain occupancy, and the patient can make it clear by doing head CT examination.