Comfrey has the advantages of clearing heat and cooling blood, activating blood and detoxifying, penetrating rash and eliminating spots. It has good effect on blood heat and toxic bloom, macula purple and black, measles opaque, sore sore, eczema, fire and water scald.
Modern pharmacological studies have shown that shikonin extracted from comfrey has an inhibitory effect on Staphylococcus aureus, hemolytic streptococcus, Escherichia coli, dysentery bacillus, pseudomonas aeruginosa and so on. Moreover, shikonin also has an obvious anti-inflammatory effect, and has an inhibitory effect on parainfluenza virus, herpes simplex virus, herpes zoster virus and so on. In addition, comfrey also has anti-tumor, liver protection, hemostasis and other functions.