Rotten tongue is likely to be caused by tongue trauma, vitamin deficiency, tongue infection, tongue cancer, etc. Patients can use medication or surgery to treat it according to their condition. 1. Tongue trauma: When the tongue is bitten, burned or cut by foreign objects, bleeding and ulceration may occur. If the injury is mild, it can usually heal on its own. If the injury is more serious, it is necessary to go to the hospital for debridement, and in serious cases, it even needs suture treatment. 2. Vitamin deficiency: vitamin B, vitamin C, folic acid deficiency may cause tongue ulcers, tongue ulcers caused by this condition can be treated by taking multivitamin tablets. 3. Tongue infection: bacterial and fungal infection can be easily caused when the flora in the oral cavity is out of order, which leads to tongue rotting, and it is necessary to go to the hospital for examination and carry out the corresponding anti-infection treatment under the guidance of the doctor. 4. Tongue cancer: If tongue rotting occurs for a long time, you need to be alert to ulcerative tongue cancer, and if it is tongue cancer, you need to carry out surgical treatment as well as postoperative adjuvant chemotherapy, radiotherapy and so on. There are many reasons for tongue rotting, it is suggested that patients should not use medicine privately, and if the situation is serious, they should go to the hospital for diagnosis and treatment in time.