Comfrey root and leaf have been used since Roman times, dating back thousands of years. This herb has been utilized in folk medicine throughout Europe and North America and has been widely cultivated as a garden medicinal specifically for its reputation for healing various internal and external wounds. Comfrey is most often used externally. The oil is extracted from comfrey (Symphytum officinale), a perennial herb of the Boraginaceae family with a black, turnip-like root and large, hairy broad leaves bearings small, bell-shaped flowers. The plant has found widespread use in folk and herbal medicine, acting as a healing agent.