What tests are done in case of sudden dizziness, nausea and vomiting should be based on the patient’s history, such as cervical spondylosis, anemia, Meniere’s disease complex, posterior circulation ischemia, and benign episodic positional vertigo. Generally, X-ray, electrocardiogram, electroencephalogram, head CT, blood sampling and other tests can be chosen. 1. Cervical spondylosis: specialized examination of cervical spondylosis, X-ray examination, electromyography, CT examination, etc. are feasible. 2. Anemia: routine blood test, bone marrow examination, etc. are feasible. 3. Ménière’s disease: audiological examination, pure tone audiometry, cochlea electrography, otoacoustic emission, temporal bone CT examination, etc. are feasible. 4. Posterior cerebral circulation ischemia: digital subtraction angiography, CT angiography, MRI angiography and vascular Doppler ultrasonography are feasible. 5. Benign episodic positional vertigo: mainly Dix-Hallpike test. Patients with sudden dizziness, nausea and vomiting should go to the hospital in time, and wait for the doctor to ask about the medical history and do the relevant examination in order to find out the cause of the disease and treat the symptoms.