I am 62 yrs young and very active but I guess I over did it and strain my right knee. Terrible pain and swelling and tried ice and wrapping my knee but it didn't help at all. I tried arnica gel, there's also arnica cream and amazing how much better my knee is within 2 days. I urge anyone with knee pain or anywhere else to use arnica topically. I know you can get the pellets but I don't know if it works as well as the cream. Pain is so depressing. Wish all of you the best and thanks EC for your site.