Voltarol Back and Muscle Pain Relief 1.16% Gel helps to relieve pain and reduce inflammation and swelling. It contains the active ingredient Diclofenac which is an an anti-inflammatory. It is specially formulated for rubbing into the skin with no mess thanks to the new No Mess Applicator and is used for relieving pain, inflammation & swelling in painful conditions affecting the joints and muscles. Voltarol Muscle Pain Relief 1.16% Gel can be used to treat: Muscle Injuries Sporting Injuries Joint Injuries Sprains Bruses Backache Tennis Elbow