Eating betel nut mouth rotten, may be due to betel nut damage oral mucosa, and then the formation of oral ulcers. It may also be a malignant ulcer caused by long-term betel nut chewing, i.e. oral cancer. Usually malignant ulcers are relatively less painful and have poorly defined borders with surrounding tissues, and the base of the ulcer is also uneven compared to ordinary mouth ulcers. However, regardless of the nature of the oral injury, betel nut should be stopped immediately. And different cases of ulcers, treatment measures also have some differences: a. Benign oral ulcers: 1. Topical drugs: first need to keep the mouth clean, you can use light salt water gargle, or use a gargle containing chlorhexidine for gargling. Eliminate local inflammation can first use chlorhexidine solution with gargle anti-inflammatory, then spray the mouth with watermelon cream spray, and finally apply ice borax evenly on the ulcer. If the pain is severe, you can also use a drug film containing a surface anesthetic to apply to the ulcer as prescribed by your doctor. In addition, you can also follow the doctor’s instructions to use oral ulcers, metronidazole cheek tablets, lidocaine gel, compound benzocaine gel, rehabilitation new liquid and other drugs for treatment, to prevent local infection, as well as relieve pain and other uncomfortable symptoms; 2, oral drugs: in the active use of external drugs for treatment at the same time, when the symptoms are heavy, you can also take oral antibacterial drugs, such as metronidazole cheek tablets, as well as vitamin C tablets, B vitamin tablets, etc., to supplement the body’s nutrition. Malignant oral ulcer: Malignant oral ulcer is oral cancer, which is a general term for malignant tumors of the oral cavity, mostly belonging to squamous epithelial cell carcinoma, and requires timely medical consultation, clear diagnosis through physical, laboratory and imaging examinations, and active surgical treatment such as radical resection, lymph node dissection and tissue defect repair, as well as comprehensive treatment such as radiotherapy, chemotherapy and immune-targeted therapy. Long-term betel nut chewing is more damaging to the oral mucosa, especially for those who suffer from oral diseases. Therefore, after you stop eating betel nut, you should also pay attention to oral health, pay attention to a light diet, less spicy and stimulating food, quit smoking and alcohol to reduce the stimulation of the oral mucosa, and regular rest and rest to maintain resistance. When the oral mucosa erosion is serious, timely examination and treatment.