Rotten tongue is suffering from tongue ulcers, tongue inflammation, flat moss and other tongue mucosa diseases, the treatment is as follows respectively: 1. Ulcers are common and prevalent, ulcers cause redness, swelling and breakage of the tongue mucosa, which can be congested and erosion causing severe pain and seriously affects speaking and eating. Watermelon cream spray, tretinoin ointment, lidocaine gel and recombinant human epidermal growth factor can be sprayed locally on the tongue. The diet should be light, warm and soft. Eat more foods rich in vitamin C, vitamin B, iron and zinc, such as kiwi, orange, animal liver, soy products and seafood, etc. Avoid spicy, stimulating and greasy foods. You can take herbal medicines and teas with the function of clearing heat and lowering fire, such as Niuhuang detoxification tablets, Shangqing tablets, honeysuckle tea, chrysanthemum tea, etc.; 2. If the tongue is suffering from flat moss or white spots, it needs to be treated by hormone injection or surgical removal under the guidance of an oral mucosal disease specialist.