hi Ansky

Yes, I agree with en bloch.
to find out WHY the Prednisone worked on your symptoms. Because, the fact that prednisone worked, means that there was an inflamation. A lot of inflamatory autoimmune disorders, needs some steroid during periods of excaserbation or flare ups. Steroid, eighter in the form of oral Prednisone, or injectable steroids is the standard treatment for many such conditions.
And also long term smaller doses is sometimes needed in some inflamatory autoimmune disorders.
BUT yes, steroids have many side effects, and can actually be very dangerous at times, it can caus a slu of conditions.

But for now, you need to find out why the steroid worked. Actually, look at it as a clu to find the answer. That is how your doctor should look at it.