Six parts of talc and one part of licorice are the ingredients and effects of Liuyisan. It is composed of six parts of talc and one part of licorice, and has the effect of clearing summer heat and relieving dampness. It can treat body tiredness due to summer heat, thirst, diarrhea, and little yellow urine. In addition, it can be used externally to treat prickly heat and the itching due to prickly heat. It is a famous formula for clearing summer heat and dampness because of its calm medicinal properties, clearing heat without leaving dampness, and promoting water without hurting yin. In addition, it can be used for all damp-heat conditions, such as cystitis, urethritis, cholecystitis and some other diseases with summer dampness, which can also be treated with Liu Yi San.