Children eating betel nut, there are many hazards, such as causing oral diseases, excessive wear and tear of teeth, digestive system diseases, central nervous system abnormalities. 1. Oral diseases: frequent chewing of betel nut, betel nut in betel nut, betel nut alkali will have an irritating effect on the oral mucosa, resulting in oral ulcers, oral cancer and so on. 2. Excessive wear and tear of teeth: betel nut is hard, and frequent chewing can cause excessive wear and tear of children’s teeth. 3. Digestive system diseases: betel nut alkali in betel nut, but also on the stomach to produce stimulation, affecting the normal digestive function, and even cause gastritis, gastric ulcers and so on. 4. Central Nervous System Abnormalities: Eating betel nut can effectively stimulate the central nervous system, making people become excited and dependent. Betel nut is a class 1 carcinogen, which is harmful to human body and should be avoided. If you feel unwell, it is recommended that you seek medical advice.