Soothing aromatic herbal massage oil. This soothing blend of herbal oils contains Comfrey (also known as Knitbone), also known for its healing properties, and Eucalyptus Oil. Comfrey (Knitbone)- traditionally used for the symptomatic treatment of minor sprains and bruises. Eucalyptus oil - used externally to stimulate blood flow. Soothing aromatic herbal massage oil. This soothing blend of herbal oils contains Comfrey (also known as Knitbone), also known for its healing properties, and Eucalyptus Oil. Comfrey (Knitbone)- traditionally used for the symptomatic treatment of minor sprains and bruises. Eucalyptus oil - used externally to stimulate blood flow.