Headache, confusion, nausea: 1. It can be seen as a result of increased blood pressure, especially blood pressure higher than 180/110 mmHg. In severe cases, the patient can develop hypertensive encephalopathy and the patient shows headache, confusion and nausea. For the above situation, the patient should be given blood pressure control, and if necessary, blood pressure monitoring should be carried out 4-6 times/day to control the peak of blood pressure. 2. Headache, confusion and nausea can also be seen in some patients with inadequate blood supply to the brain, Headache, confusion, nausea can also be seen in intracranial infectious diseases, especially viral encephalitis, early meningitis, patients can have headache, confusion, nausea, also can be accompanied by fever, patients should be given active treatment of intracranial infections. 4, headache, confusion, nausea can also be seen in some patients with vestibular migraine, for this case, patients can be given oral non-steroidal anti-inflammatory drugs.