osteoarthritis
"I use Voltaren Gel for knee arthritis.  If I take a pain pill, it takes about 1 to 1.5 hours to work.  This works in seconds, and fixes "most" of the pain, "most" of the time.  It also helps my very sore feet, probably plantar fasciatis.   I don't know why they did not give this to me earlier, its much more effective than oral NSAID's or even Vicodin, as this works faster, much faster.   I use it less often than recommended (up to 4 times a day), because its not needed.  Once or twice a day for me relieves the pain, pronto.  It also helps my wife, with her osteoarthritis pain."