Dear Val,
From what you are saying it sounds like your husband's foot has collapsed. You did say that the protrusion were on the bottoms and the inside of his feet. Yes?
This is called a "Charcot foot" also a "Rocker Bottom foot"
Your husband needs to be seen by a medical professional. First and foremost.
Conservative treatment involes proper fitting shoes and orthotics that properly envelop his feet and all their contours.
I looked online for you and got a website with a picture of this condition so that you can verify.
http://www.footphysicians.com/footankleinfo/charcot-foot.htmBest,
Spencer