The mouth ulcers can be chosen according to the type of evidence, such as ox-huang detoxification tablets, clearing down tablets, Zhi Bai Di Huang Wan and other medicines. 1. Ox-huang detoxification tablets: with the effect of clearing heat and detoxification (clearing heat and toxicity in the body), it can be used for fire and heat, sores on the mouth and tongue, sore throat, and swelling and pain in the eyes. Taking oxalic detoxification tablets may appear abdominal pain, diarrhea, skin rash and other adverse reactions, pregnant and lactating women are prohibited, infants and young children are prohibited. 2. clear drop tablets: oral ulcers due to the accumulation of heat in the spleen and stomach can choose to clear drop tablets, has the effect of clearing away heat and detoxification, relieve sore throat, constipation, fever and irritability. The adverse reactions and contraindications of Qingdiao Tablet are not clear. 3. Zhi Bai Di Huang Wan: oral ulcers can be selected because of the floating fire Zhi Bai Di Huang Wan, with nourishing yin and fire (nourishing Yin essence, reduce the fire) effect, clinically can be used for yin deficiency and fire (Yin essence deficiency, the emergence of hyperactive fire), dry mouth and sore throat, urinary short red (urinary volume is small, dark yellow color), and so on. The adverse reactions and contraindications of Zhi Bai Di Huang Wan are not clear. Patients with mouth ulcers should consult a doctor for diagnosis and treatment in a timely manner, and the above medications should be taken under the guidance of a traditional Chinese medicine practitioner, to avoid taking medications on their own.