bone disease

My father came home from visiting my mum in the nursing home and a note says she has degenerative bone disease.
And is getting something stronger(I’m guessing med).
How bad is this?

That’s a rather vague term that covers several problems. Some are sorta minor, like my osteoarthritis. There are more severe forms of arthritis, and there’s osteoporosis, which is loss of the bone’s strength. And there’s some others that I don’t understand at all. The info your dad gave you is not much to work with. I wish you and your parents all the best.