1, betel nut contains carcinogenic alkaloids, which leads to oral cancer. At present, many people suffer from oral cancer because of betel nut; Oral submucosal fibrosis and leukoplakia caused by chewing betel nut, that is, the prophase lesions of oral cancer, are characterized by difficulty in opening mouth, pain, numbness, whitening of oral mucosa and ulcer.

2. Eating too much betel nut has a great influence on the digestive system, because betel nut juice damages the taste nerve and saliva secretion, hinders the digestive function, and betel nut residue stimulates the stomach wall, leading to inflammation and even perforation of the gastric mucosa, affecting nutrient absorption and causing malnutrition. In particular, children eating betel nut can easily lead to malnutrition.

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