Betel nut benefits to people: (1) anthelmintic effect: betel nut alkaloid is an effective anthelmintic component, the pork tapeworm has a strong paralytic effect on the beef tapeworm can be completely paralyzed by the head and immature segments, in vitro test on the rat pinworms also have a paralytic effect, but also can be poisoned by ascaris lumbricoides. (2) Antiviral, anti-fungal unobtrusive meat infusion has different inhibitory effects on skin fungi such as Trichophyton coriaceum in the test tube. Decoction and water infusion have some inhibitory effect on some strains of influenza virus A. These effects are related to its high content of read matter. (3) break the accumulation of water betel nut alkali can excite M a choline receptor caused by gland secretion, increase intestinal peristalsis, contraction of bronchial tubes, dilation of blood vessels, but also can be excited by N a choline receptor caused by skeletal muscle, ganglion excitation, so that the accumulation of blood to run faster, the body of the normal distribution of water. To achieve the effect of water breakage. (4) Digestive mode alkali can excite M a choline receptor, chewing unicorn can make gastrointestinal smooth muscle tension rise, enhance intestinal peristalsis, promote gastric secretion, so it can help digestion, enhance appetite. (5) Antihypertensive Areca 11-5-C substance isolated from betel nut has significantly inhibited the activity of angiotensin peptide transferase (ACE) in vitro test, angiotensin I and H of the elevated blood pressure response to produce quantitative inhibition. Harmful effects of betel nut on human body: IARC (International Agency for Research on Cancer), in its August 7 special publication, Volume 85, identified betel nut as a Class I carcinogen. This conclusion confirms the long-suspected causal relationship between betel nut chewing and cancer in the medical field. The group led by Prof. Liu Shufan of Hunan Xiangya Hospital Stomatology Department investigated betel nut chewers in Xiangtan, Hunan Province and other places and found that the rate of oral submucosal fibrosis was 0.96%. According to Yuanjiang City People's Hospital Stomatology Department Dr. Li, in her hands every month about 40 cases of oral diseases, including betel nut chewing caused by nearly 10 cases. With a report: 90% of male oral cancer in Taiwan due to too much love for betel nut chewing. The mortality rate of oral cancer among men in Taiwan has been rising at a growth rate of 10% per year, and the mortality rate of oral cancer in the past ten years has increased by 1.4 times compared with that of ten years ago. Oral cancer has risen to the 14th place among the ten major causes of cancer deaths in Taipei City in 2002 (with males taking the 9th place). Qiu Zhanxian, chief of the first section of the Department of Health in Taipei City, said that 88% to 92% of oral cancer patients are caused by chewing betel quid, which shows that the prevention and treatment of oral cancer is a matter of great urgency. Therefore, Taiwan will organize "Betel Nut Prevention and Control Day" on December 3 every year to enhance the public's knowledge of the hazards of betel nut and oral cancer. 4, the production of betel nut: in order to make betel nut more powerful, more intoxicating, the processing of betel nut is added to the process of building a house with lime and the main raw material for the manufacture of methamphetamine ephedra. It is understood that ephedra is a herbaceous plant, containing ephedrine components have a significant central excitatory effect, will make people's heart beat faster, leading to vasoconstriction, causing morbid addiction and tolerance, is the main raw material for the manufacture of crystal methamphetamine, was included in our country into the control of the second class of psychotropic substances. Lime is not a food additive, and can never be added to the direct use of food, quicklime contains lead, mercury and other heavy metals, consumers will be lead poisoning if they eat for a long time and in large quantities. Analysis and Discussion Through the analysis and discussion of the above information, we believe that although betel nut has certain benefits, such as driving roundworms, moistening the lungs and digestion, etc., but chewing betel nut for a long time not only causes facial chewing muscle enlargement and serious wear and tear of the teeth, resulting in the oral cavity submucosal fibrosis, but also due to the unscrupulous manufacturers in the production process of adding quicklime and ephedra, so that the person is poisoned with an addictive, which will lead to cancerous lesions in the oral cavity. At the same time, chewing betel nut will cause oral cancer aside, chewing betel nut and spitting betel nut juice of the bad customs, the impact on the city should be emphasized. Many people who are addicted to betel nut do not pay attention to the constraints, randomly in the station, dock, street and some other public **** place to spit betel nut juice, beautiful public **** place stained with blood red betel nut juice, it is really a great sight. V. Suggestions 1, to do not chew betel nut, in order to reduce the occurrence of oral diseases, such as can not be done to minimize chewing. 2、Require betel nut manufacturers like cigarettes to clearly indicate on the package that chewing betel nut is detrimental to health, and to increase their taxes to subsidize the prevention and treatment of oral cancer. 3. Ban betel nut chewing in public ****ing places like smoking, so as to reduce the workload of cleaning workers and prevent Yuanjiang from becoming the legendary "Black Tooth Country" in the Classic of Mountains and Seas.