Zihuadidin is the whole grass of Corydalis plant, mostly produced in the Yangtze River basin, harvested in spring and fall, dried and used raw. Zihuadidin has the effect of clearing away heat and detoxification, with bitter and pungent flavor, cold and cool in nature, and is mostly used for treating furuncle and carbuncle, such as folliculitis and acne co-infection. Carbuncles, also known as mastitis, intestinal carbuncles such as acute appendicitis, can also be used to treat dandruff, often used in conjunction with dandelion, wild chrysanthemum and other drugs to enhance the efficacy of the treatment, such as the five flavors disinfectant drink. The water is decocted and taken internally, and the fresh flowers are pounded and applied to snake bites, which can be used to treat snake bites. Zihuadidin also has the effect of treating liver fever, red eyes and swelling pain.