In December, 2007, I 'crashed' on my knee while shoveling snow; developed water on the knee, torn cartilage and also found arthritis. One shot of Cartisone and 3 injections of HA later, I still had the pains of the knee stiffening up after sitting for >15 minutes and limping around until the knee loosened up which only resulted in noticable, but not very painful limping. Last weekend I tried the Castor Oil Pack for 1 hour and felt a 85% improvement immediately, and since then I've repeated the treatment at least 8 times; each time the knee is better. I can not believe how fantastic this treament is.