Voltaren Gel is in a group of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs). Voltaren works by reducing hormones that cause inflammation and pain in the body. Diclofenac topical skin patch (Flector Patch) is used to treat pain caused by minor sprains, strains, or bruising. Voltaren Gel (diclofenac topical 1%) is used to treat joint pain in the hands, wrists, elbows, knees, ankles, or feet caused by osteoarthritis. Voltaren Gel may not be effective in treating arthritis pain elsewhere in the body. Solaraze Gel (diclofenac topical 3%) is used to treat warty overgrowths of skin (actinic keratoses) on sun-exposed areas of the body. Voltaren Gel may also be used for other purposes not listed in this medication guide