The herb called toad skin has the effect of diuretic and swelling, clearing heat and detoxification (removing heat and poisonous evils from the body), and can play a role in improving carbuncle (a kind of poisonous sores, acute purulent diseases occurring on the surface of the body, limbs, and internal organs), swelling and poison, eczema, and abdominal distension. Toad skin is the dried skin of Chinese big toad or black orbital toad of the toad family, which is bitter and cool in nature, and belongs to the meridian of heart, lungs, spleen and large intestine. Decoction of the soup or dried products or powdered dressing, fresh products can play the role of diuretic, swelling, and clearing heat and removing toxins. Toad skin is also effective in canker sores, chancre (the symptom of children’s yellow face, belly and abdomen swelling), abdominal distension, scrofula (mainly refers to cervical lymph node tuberculosis) and other diseases. This drug has some toxicity and is contraindicated in people with deficiency of the surface and deficiency and distension. Other patients also need to strictly follow the doctor’s instructions when using the drug, do not use the drug without authorization to avoid risks.