M.H.
Hi P.,
There are so many things that could be wrong. The one thing I will suggest is to take a holistic approach. It could be anything from a bacterial infection, to something genetic, to Vitamin B deficiency. One of the biggest problems in our country today is that our doctors don't take the time to truly investigate all the options. The steriods may be helping him now but it's just a bandaid to the problem. (Bandaids have their place, but they are not meant to be long-term.)Make sure your friend forces the hand of the doctor to look at all options.
I'll be praying!
M.