Many people will experience dizziness or discomfort when riding the bus, mainly for the following two reasons: 1, vestibular hypofunction, many people have the experience of seasickness or motion sickness, such patients in the process of riding any acceleration, deceleration, will cause the vestibular organs can not adapt to the speed leading to nausea, vomiting and even dizziness symptoms; 2, the bus has a certain special environment, generally more people, the air is more stuffy, for many Patients with poor plant nerve function are prone to a state of hypoxia leading to dizziness symptoms. Therefore, usually the above two aspects are the most common reasons for dizziness in the bus.