The main causes of dizziness and vomiting at night are the following: first, it is considered to be caused by cerebral arteriosclerosis and insufficient blood supply to the brain. Secondly, it may be caused by gastrointestinal disorders, such as gastric distension, which may slow down the gastric motility of the patient, and spicy and stimulating food or poorly digested food, which may easily stimulate the gastrointestinal tract and lead to abdominal distension and discomfort, as well as dizziness and vomiting. Thirdly, dizziness at night may also be caused by elevated blood pressure, which can be clarified by blood pressure testing. Fourthly, dizziness and vomiting at night may be caused by an attack of otoliths or cerebrovascular spasm or peripheral vertigo diseases such as Meniere’s disease, vestibular neuritis, or vestibular paroxysms if the symptoms are severe.