The causes of dizziness and yawning are as follows: 1. Consider that it is caused by insufficient blood supply to the brain, when the patient’s brain tissue and brain cells are in a state of ischemia and lack of oxygen, the patient is prone to drowsiness, weakness, dizziness and yawning, and the patient has a history of cerebral arteriosclerosis. 2. 3. Patients with dizziness and yawning should pay attention to whether it is caused by poor sleep quality at night, such as the presence of nocturnal sleep-apnea syndrome in patients, which leads to chronic ischemia and hypoxia in the brain and makes patients easily have symptoms of dizziness and yawning.