Bumps on horse's back

["guest@endurance.net" <guest@endurance.net>]

Connie equibroke@aol.com
Has anyone ever experienced bumps occuring on their horse's back after removing the saddle.  These bumps are about the size of a nickle and are hard.  My horse does not react when they are touched.  I have tried every kind of pad imaginable but she still gets them.  This just started occuring after I had new panels put on my 9 year old Orthoflex Cutback saddle.  I don't know if the material the new panels are made of might be different but this is driving me up the wall.  The bumps normally go away within 24 - 48 hours.  Any ideas would be appreciated.