Eating betel nut causes fast heart rate, which is presented in many people, manifested as heart panic, red face and other discomforts, mainly because betel nut contains certain betel nut alkali, which has a certain parasympathetic effect, which will lead to increased heart rate, moderate increase in blood pressure, red face, etc., and may also be more mentally exhilarating. Some manufacturers may also add ephedra-like substances for the taste of betel nut, which will also promote increased heart rate. In addition to increasing the heart rate and making people excited, betel nut is most likely to cause oral cancer. At present, China and the World Health Organization are considered betel nut is a serious carcinogenic substances, so do not chew betel nut. In life patients must pay attention to other lifestyle adjustments and drink less stimulating drinks, such as milk tea and coffee.