Patients who experience sudden dizziness, vomiting, and numbness in one side of the arms and legs are considered to be caused by acute cerebrovascular disease, such as infarction or embolism in the brain stem area. Problems in the patient’s cerebral hemispheres, such as problems in the cerebellum, also tend to cause the above symptoms, and the patient should immediately consult a hospital for examination and treatment. Patients with numbness in the arms and legs, sudden dizziness and vomiting may be caused by acute gastroenteritis or peripheral vertigo, such as Meniere’s disease, vestibular neuronitis, or vaginitis. Patients need to visit the hospital to improve the relevant tests and then take symptomatic treatment after clarification.