小儿口腔溃疡是儿科的常见病之一。其主要病机为心脾积热或为虚火上炎。导赤散出自北宋钱乙的《小儿药证直诀》,是钱氏治疗心热的代表方。其组成是 :生地黄、生甘草、木通各等份 ,研末 ,入竹叶同煎 ,食后温服。方中生地凉心血 ,竹叶清心气 ,木通降心火、利小便 ,甘草解毒和中 , Pediatric oral ulcer is one of the common pediatric diseases. The main pathogenesis of heart or heat accumulation or inflammation of the fire. Guide red scattered money from the Northern Song Dynasty “Pediatrics straight formula” is the representative of Qian’s treatment of heart heat. Its composition is: Rehmannia, licorice, Mouton each equal parts, into the end, into the same bamboo leaves, after serving warm clothing. Fang Zhongsheng to cool, bamboo clear heart gas, wood down heart fire, Lee urine, licorice detoxification and,