Mouth ulcers refer to mouth ulcers, Chinese medicine treatment of mouth ulcers need to recognize the evidence and use of drugs, such as the heart and spleen heat with cool diaphragm powder with addition and subtraction, yin deficiency and fire with Zhi Bai Di Huang Tang with addition and subtraction, and so on. 1. Accumulated heat in the heart and spleen: oral muscle membrane ulcers, peripheral redness and swelling, burning pain, especially when eating or talking, accompanied by thirst, insomnia, constipation, yellow urine. When clearing the heart and diarrhea of the spleen, swelling and pain, can be used to cool the diaphragm scattered plus reduction. 2. Yin deficiency and fire exuberance: the number of mouth ulcers is small, the peripheral redness and swelling is not too much, the pain is mild, but this is more and more, prolonged. Accompanied by heat in the hands and feet, insomnia and dreams. The treatment is to nourish yin and tonify the kidney, lower the fire and converge the sores, and use Zhi Bai Di Huang Tang to add subtractions. 3. Spleen and kidney yang deficiency: Mouth sores are mildly painful, white or dark in color, with reddish or non-reddish periphery, and difficult to heal for a long time. Accompanied by fatigue, pallor, cold pain in the waist and knees or below the abdomen, dullness (lack of appetite, reduced food intake), and loose stools (thin and unformed stools). When warming the kidneys and strengthening the spleen, resolving dampness and astringing sores, add subtractions with Radix Rehmanniae Tong (附子理中汤). Patients with mouth sores should eat more fresh fruits and vegetables to replenish water and vitamins, which is conducive to recovery. During the period also need to rest more, avoid overwork, and strengthen the exercise, improve the body’s immunity. For patients suffering from mouth sores, daily attention should be paid to diet, eat less spicy and stimulating food. If you need to use medication, it should be used under the guidance of a doctor.