Betel nut contains a substance called betel nut alkaloids, this ingredient has a choline-like effect, promotes the body’s nerve excitation, increases intestinal peristalsis, also causes the body’s heartbeat to accelerate, blood vessels dilate, blood circulation accelerates, so that the bronchial tubes are constricted, the blood is accelerated in the pharynx, which will cause a person to produce the feeling of choking, making the person excited and feverish. Normal phenomenon that occurs in almost everyone who eats for the first time, as long as you spit out the betel nut immediately after this feeling occurs, the symptoms will be relieved and disappear. Although this phenomenon appears as a normal phenomenon, betel nut is clearly defined as a carcinogen, there is a strong irritation, will stimulate the oral cavity and throat parts of the mucous membrane to produce inflammation and sloughing, hardening, chewing will produce a strong carcinogen nitroso, long-term chewing of betel nut can easily lead to long-term damage to the mucous membrane or even malignant changes that make it easy to suffer from oral cancer, to try to eat as little betel nut as possible.