I used castor oil on my feet at night to get rid of bone spurs on the bottom of my feet. After showering I rubbed a generous amount of castor oil on my feet put on socks and slept with them on all night for about 1 month. The bone spurs are gone and my feet feel so much better. I recommend that to anyone with aching feet. It works.
My Mum and aunt have both successfully got rid of bone spurs on their feet using castor oil. I've also started using it on a Haglund's deformity on my heel and it is shrinking.
About 10 yrs ago, I had plantar fasciitis. I used the castor oil massage followed at bedtime by a saturated cotton ball directly over the site, covered by piece of plastic bag, a not too tight ace wrap, and a sock. I wore Haflinger brand wool clogs (excellent arch support) any time I was not wearing shoes. I took turmeric daily, 1/2 tsp beaten into an egg. fried "scrambled" fashion until just done (turmeric breaks down under excessive heat. Absorbed better with a fatty carrier.) Not bad. In a week the pain was greatly reduced. Over time, all pain was gone. After about a year, I could not detect the place where the bone spur had formed on my heel.
I now go bare foot again and the problem has not recurred.