Flat moss is called purpura in Chinese medicine. Zihuadidin can not be used for the treatment of flat moss, this product is mainly used for the treatment of feverish diarrhea and dysentery, dengtoxin (an acute infectious disease, visible redness of the skin like paint), furuncle carbuncle gangrene (is a kind of poisonous sores, which occurs on the surface of the body, limbs, internal organs of the acute suppurative disease) and other certificates. Zihuadidin is a plant-based traditional Chinese medicine, cold in nature, bitter and pungent in flavor, and belongs to the heart and liver meridians. Zihuadidin has the efficacy of cooling the blood and eliminating swelling, clearing heat and removing toxins, and can not be used to treat purpura, without this effect, this product is mainly used for the treatment of damp-heat diarrhea (diarrhea caused by feeling damp-heat evils), jaundice, carbuncles and gangrene (sebaceous gland septicemia infections), eye redness and swelling pain, dengtoxin, venomous snake bites, and so on. Adverse reactions and contraindications, precautions of Zihuadidin are not yet clear. Purpura is a skin disease, with purplish-red polygonal flat papules as the typical lesions, often accompanied by mucous membrane damage. Treatment depends on the condition of the identification of drugs, commonly used Chinese medicine prescription four elimination of wind soup plus reduction, Zhi Bai Di Huang Tang plus reduction, and so on. Purpura should be diagnosed in a timely manner and treated with medication under the diagnosis of a Chinese medicine practitioner, and should not be used on its own, so as to avoid causing adverse consequences.