Betel nut contains betulin, which acts on the human body by increasing intestinal peristalsis, slowing down the heartbeat and lowering blood pressure. As the heart rate slows down and blood pressure drops, the body will show signs of insufficient blood supply to some of the organs, so it will feel dizzy and tight in the chest. Different people do not react to alkaloids in the same way. Some people may feel euphoric or refreshed after chewing betel nut. If you feel tightness in the chest or dizziness after eating betel nut, it is not recommended to chew betel nut regularly, although betel nut has the effect of removing stagnant food and refreshing the mind, but regular chewing is also associated with the occurrence of oral cancer and esophageal cancer, and regular chewing of betel nut has a certain degree of damage to the teeth.