Mouth ulcers, called mouth sores in Chinese medicine, are a common ulcerative injury to the oral mucosa, mostly on the tongue, lips, cheeks, palate, gums and other parts of the mouth, with severe pain and localized burning when attacked or irritated, and in severe cases, affecting eating and speaking. In Chinese medicine, the classification of oral ulcers is first divided by location, and different parts belong to different internal organs, and Chinese medicine believes that “the heart is open to the tongue”, so ulcers that occur on the tongue belong to the heart. Most of the ulcers occurring in the tongue are heat-related. This type of ulcer is also red in the center, surrounded by redness, pain is obvious, the overall tongue is red with yellow coating, the treatment is to clear the heart fire, available Huang Lian Shang Qing Wan, or Huang Lian, bamboo leaf 2g each drink as tea, the disease can be stopped, more can be healed quickly; heat may also be heart yin deficiency, this type of ulcer is also red and pain, but lighter than the heart fire type, the overall tongue is dry and thin coating light flaking, the treatment is to benefit heart yin In this case, we can drink 3g each of maitong, asparagus and xuan shen as tea, and take it for more than 1 week, the prognosis is better.