Hello dear hope you and your nani are fine,,,,,,,,, Dear old age iz itself a challenge ,,,lump in hand nd specially in finger with restricted motility and pain in other joints also points to
osteoarthritis ,,,,if it is in finger joints it is heberden or osslers node ,,,these two are particular signs of osteoarthritis,,,take ur nani to some medical specialist she need to be examined in detail ,,get her blood counts done ,uric acid levels Are also important ,,,,yes other sign of osteoarthritis is
migratory pain men pain starts in one joint and moves to other take care stay blessed