Knee pain has worried me for a couple years now, I'm too young for a replacement and really dislike the thought of a steroid injection. I purchased Willow Balm for my husband's sore back (and shoulders, and...) but the other day my knee was really hurting after a steep hike and so I tried it on myself. What the? Within five minutes the pain was gone,and it stayed that way for hours. I LOVE this stuff!