Nausea and dizziness are clinical symptoms, and very diseases can cause nausea and dizziness, mainly seen in the following areas: First, in patients with high fever, prolonged fever may cause symptoms of nausea and dizziness. Second, if the patient has a previous history of heart disease, some atypical myocardial infarction, the main symptom is also nausea and dizziness mainly, this time to the hospital to do electrocardiogram examination. Third, if there is persistent nausea and dizziness, accompanied by weakness of the limbs, we should consider whether the patient has acute cerebrovascular disease, and need to go to the hospital for cranial magnetic resonance or CT examination. Fourth, if the patient has been in a state of hypotension for a long time, the lack of circulation caused by a large amount of diarrhea or fever may cause postural hypotension when getting up and moving around, manifesting as dizziness, nausea and vomiting.