Hello,

My mum has this condition, a little exercise goes a long way, but so does a good rest. I notice stress triggers her attacks. If she gets upset or does too much. Steroids is a last resort.
The trouble with this illness is there is no test for it just illimination. A good diet will always benefit. But at your aunts age Im afraid these pains may simply be due to age and lack of regular movement.

I would try reassuring her that she is ok and this new diagnosis is not to be worried about. However it may do her good to get some anti inflammatories from her doctor.

Take care