Betel nut is a kind of evergreen plant, long-term chewing will easily lead to oral ulcers, oral cancer and other diseases, thus causing serious harm. 1. Oral ulcers: chewing betel nut for a long time will lead to the aggravation of oral mucus cysts, which will lead to the emergence of oral ulcers and aggravate the pain in the oral cavity in the long run. 2. Oral cancer: If you chew betel nut for a long time, it can lead to whitening of the mucous membrane inside the mouth, and even the formation of white spots or moss-like changes, such as this is not treated in time, and choose to continue to chew betel nut, coupled with the stimulation of smoking, it will increase the incidence of oral cancer. It can be seen that long-term chewing betel nut will cause serious harm, once developed into oral cancer, it will threaten the life of the patient, so it is not advisable to chew betel nut in life.