I don't know if you have such experience. Sometimes when we take the bus, we are very comfortable, but sometimes we feel dizzy and vomit, even our stomach is very uncomfortable. When it's serious, people will have a sense of collapse, which is caused by carsickness. So why do we get carsickness when we take the bus? What are the safety hazards to be prevented when we take the bus? First , individual differences, when the incoming balance stimulus is too strong, such as sudden braking and sharp rotation, even in the safe and normal state of the balance system, people will feel dizzy, which is a normal physiological phenomenon, which can disappear in a moment, but some people have poor tolerance, and have a strong response to the slight balance stimulus, which will produce carsickness.
Second, the quality of sleep is not good. If you stay up late the day before yesterday or the quality of sleep is not good, you will feel dizzy and vomit when you take the bus the next day, which is caused by excessive fatigue.
Third, we all know that people who are prone to carsickness are not likely to eat too much before taking the bus, but if they take the bus when they are hungry, they will also feel carsick, because hunger will make people feel dizzy and dazzled. In addition, the vibration of the car and the roar of the engine will lead to carsickness.
Fourth, the air in the car is not circulating, especially when the air conditioner is turned on in summer, the bus is completely sealed, and the windows are closed. In this way, the smell of sweat, foot odor, gasoline, etc. of the passengers inside will be full of the tip of the nose, and the people who are prone to carsickness will naturally want to vomit.
From the above four points, we can see that carsickness by bus is mainly caused by individual differences, poor sleep quality, over hunger or over satiety, and the lack of air circulation in the carriage.