Radiotherapy causes damage to the human body, mainly radiation damage, resulting in edema and even ulceration of the skin mucosa. Chinese medicine that heat poison burns the skin, heat poison gathered in the skin caused by the damage, the ulcer will last for a period of time, clinical treatment is through: 1, often keep the mouth clean, hospitals have mouthwash, saline, often keep the mouth clean, after meals to clean, gargle, do not let the residue, dirt stagnation; 2, to drink more water, drink more water is to moisturize the oral cavity; 3, oral ulcers, to be symptomatic treatment. Early ulcers are not big, commonly used Pientzehuang can also be used to crush Niu Huang Xie Du San into powder. Large ulcers, accompanied by infection, swollen lymph nodes in the neck, antibacterial treatment is recommended. Chinese medicine for mouth ulcers, preferred Niu Huang detoxification powder, Six Shen Pills, and the most commonly used Pientzehuang, these drugs are nourishing Yin detoxification, play the role of detoxification through the bowels, the effect is very good.