Voltaren contains a pain-relieving medicine that is available for the first time without a prescription. Its mild scent disappears fast as the non-greasy gel quickly penetrates the skin, delivering the medicine to the painful inflamed areas where relief is needed. Voltaren Gel is for the relief of aches and pain associated with acute, localized muscle or joint injuries such as sprains, strains or sports injuries (e.g. ankle sprain, shoulder strain or back muscle pain). Rest may be helpful to assist the relief of associated pain.