I am slightly concerned about long term use of the drug prednisolone, prescribed for Arthritis. Also how my condition may develop in future. I have psoriatic arthritis.

The longer you take it and the higher the dose generally the more side effects.
Fluid weight gain can be a problem around the stomach, back of neck and rounding of the face.
It can make your skin thinner – hence bruise easier.
Also can deplete bone density – more of a concern for women.
Can also make you very awake, kind of hyper feeling.
It is a widely used drug, and not much negative feedback.