Well it sounds to me like you may have the symptoms of cushings, which could be caused from over use of the prednisolone,
Cushings causes, fluid retention, cardiac problems, sweating,
high blood pressure,
and flushing, along with a whole of other problems, eventually leading to a thinning of the bones, leading to spinal fractures,
Pheochromacytoma, is an adrenal tumour, usually very tiny, the symptoms are flushing and usually abnormal high blood pressure.