The efficacy of Zihuadidin is clearing heat and removing toxins (removing heat and poisonous evils from the body), cooling blood and eliminating swellings (treating blood heat and eliminating swelling and pain), and it has the effect of treating furuncles (sores mostly occurring on the limbs or the face, with small shapes and deep roots, as hard as nails), swelling and poisoning, carbuncles (a kind of poisonous sores, occurring in the surface of the body, the limbs, and the internal organs of the acute suppurative disease), hairy backs and other illnesses. The drug is taken as a decoction of soup for internal use. Zihuadidin is the dried whole herb of Zihuadidin in the family of Corydaceae. It is bitter, pungent and cold in nature, and belongs to the heart and liver meridians, with the effect of clearing heat and removing toxins, cooling the blood and subduing swellings. It is used in the treatment of furuncle, carbuncle, dengtu (acute infection, reddening of the skin as if painted), and poisonous snake bites. The adverse reactions and contraindications of the drug are not clear, but it should not be used by patients with spleen deficiency and diarrhea (diarrhea caused by weak spleen function). The method of administration is to take it internally by decoction. If necessary, it is recommended to visit a regular hospital for treatment under the guidance of a professional physician to identify the symptoms.