Yuzhou rhubarb, the name of Chinese medicine. It is the dried root of Cynanchum auriculatum or Cynanchum auriculatum in Compositae. It is cold in nature and bitter in taste, and has the effects of clearing away heat and toxic materials, eliminating carbuncle, promoting lactation, relaxing muscles and tendons and dredging collaterals. Commonly used for breast carbuncle, carbuncle swelling, carbuncle swelling, carbuncle swelling, breast arthralgia and dampness arthralgia.