A therapeutic agent for infectious skin and mucosal diseases to be applied to an infected area for ameliorating a symptom of the infected area caused by infection with a pathogenic microorganism includes: a chlorine dioxide solution including a dissolved chlorine dioxide gas.可改善因病原性微生物感染而發病之感染部位的症狀，感染部位所適用之對皮膚疾病及黏膜疾病之治療藥，含有具有溶存二氧化氯氣體於構成成份之二氧化氯液劑而成為特徵之對感染性皮膚及黏膜疾病之治療藥。
