The causes and treatments of rotten tongue are mainly the following: First, the tongue mucosa suffers from ulcers (recurrent aphthous ulcers), and there are no ulcers in other parts. Tongue mucosa ulcers can be localized anti-inflammatory drugs such as ulcer ointment, watermelon cream dispersion, cidium tablets, etc., apply tretinoin ointment or gargle rehabilitation new liquid, chlorhexidine gargle to promote ulcer healing, but also available to promote healing drugs, and at the same time to take multivitamin element tablets and other supplemental vitamins and trace elements; second, due to dental misalignment bite tongue or residual roots, residual crown and bad prosthesis or new denture into the tongue Mucous membrane scraping, to timely treatment of dental disorders, re-production of the denture; third, herpes virus infection leading to herpes stomatitis (more common in children under six years old), the virus will cause the mouth, tongue mucosa and cheeks in dense patches of small blisters, blisters break down, leaving a red, swollen, erosive surface, then to anti-viral treatment, you can use local anti-viral drugs such as acyclovir, containing gargle chlorhexidine solution. Fourth, the tongue mucosa with lichen planus or white spots, need to go to the oral mucosa department under the guidance of doctors to take drugs, local injection of hormones or local excision.