Yellow dock is an excellent blood purifier. It is especially effective at treating those conditions associated with poor digestion or liver toxicity such as skin rashes, joint pain, constipation, and acne. In Europe, it is cultivated as a vegetable. The leaves can be cooked and added to soups. The roots are used as medicine to treat digestive issues, sluggish liver, and respiratory infections.Discover Yellow Dock (Chin Ch’iao Mai) and other herbs by visiting our Herb Directory.