If you have been struggling with knee pain for some time, then castor oil is a treatment that you might want to try. This natural remedy has been found to be effective in treating knee pain for many people. It does not work for everyone, but it’s worth a try if you are experiencing any pain in your knees. Castor oil is an emollient oil made from the castor bean plant, which is also used to make castor sugar and castor seed meal. It can be purchased at most grocery stores or health food stores, but it’s inexpensive enough to make at home too if needed. Here, are some things you should know about using castor oil to treat knee pain.