There are several reasons for dizziness and vomiting in the morning: 1) Women of childbearing age and common women with early pregnancy will experience morning dizziness accompanied by nausea and vomiting. 2) Clinical symptoms of dizziness accompanied by nausea and vomiting will occur when the blood supply to the brain is inadequate, especially when the blood supply to the vertebral basilar artery or the internal carotid artery is inadequate. 3) Clinical symptoms of dizziness and vomiting will occur when the brain is hypoxic, such as insufficient arterial oxygen saturation, high partial pressure of carbon dioxide and low partial pressure of oxygen. The clinical symptoms of dizziness and vomiting may occur when there is an imbalance in the ratio of ventilation to blood flow due to low partial pressure of oxygen.4 The symptoms of dizziness and vomiting may also occur when there is a disturbance in the plant nervous function caused by poor rest or sleep the previous day.5 The clinical symptoms of dizziness and vomiting may also occur when waking up in the morning due to precursors such as low blood pressure or low blood sugar.