Symphytum Officinale Sprains Swelling Bruises Bone & Joint Pain Comfrey commonly known as Knit bone, gives comfort in fractures, sprains, brusies and joint pain. Each 100g contains 10ml of Symphylum officinale tincture (1:5) in an aqueous cream base. Aqueous cream is a light easily absorbed water based cream with no animal products. Also contains antimicrobial agent chlorocresol 1% W/W. Contains ethanol. For external use only. Seek professional advice if symptoms persist. Not to be used on broken skin. Do not use under occlusive dressing. Herbal Creams Martin & Pleasance creams have a 10% herb concentration, carefully blended with an aqueous cream so that the body can maximise absorption, effectively and efficiently.