The main causes and treatments of rotting tongue are as follows: first, tongue ulceration caused by ulcers of the tongue mucosa, mostly related to dietary habits, living habits, mental state, immune factors, genetics and other factors. Treatment can be applied locally watermelon cream spray, open throat sword spray, lidocaine gel and recombinant human epidermal growth factor, etc., you can also use tinidazole or chlorhexidine gargle gargle; second, by herpes stomatitis, pharyngolaryngitis resulting in tongue ulcers, the disease is caused by herpes viral infections, the symptom is that the mucous membrane appeared in a dense piece of blisters, blisters can easily rupture to leave the surface of the vesiculation. Treatment should be antiviral treatment can be oral antiviral oral solution, Banlangen granules, etc., and to drink more water, pay attention to rest; third, suffering from papillitis of the tongue, the papilla of the tongue is a taste receptor, if the inflammation will cause the tongue red, swollen, painful, treatment can be gargled with mouthwash, keep a light diet.