I've been using castor oil packs as a healing treatment off and on for years since first learning of their efficacy from a 'holistic' doctor here in Phoenix. Once years ago I accidentally slammed a car door on my ankle which caused tremendous swelling and bruising and I simply could not bear any weight on my foot. Elevated the leg and wrapped the ankle in a rag soaked with castor oil and applied heating pad over ankle. Remained that way for most of the night and upon waking, nearly all swelling and bruising was gone and I was able to walk and bear weight on injured ankle again! Amazing.
Several years ago tripped and fell down a flight of concrete stairs landing on both knees. Both knees swelled and were in excruciating pain. Proceeded to lie down with both legs elevated on top of several pillows and applied a well-soaked castor oil pack to each knee. Placed heating pad on top. Next morning - pain, stiffness and swelling was 95% gone and was able to go about my normal activities.
Am currently working on severe tendonitis in right shoulder affecting rotator cup and extending down right arm, using castor oil treatments at night. Will let you know results.