painful hip and arthritis on thumbs and index fingers

Hi

my mother, who is 74 years of age suffers from arthritic pains in both thumbs and index fingers. Can you recommend a suitable remedy?

Her diet is not very good. She is only 50kg and 145cm so is very slight in build.

Her weekly diet consists only of:

porridge oats, bananas, tomatoes, wholemeal bread, salad leaves, brazil nuts, fresh orange juice, but mostly cakses and buscuits and supplemented by garlic perles, evening primrose oil. She also does not drink sufficient quantities of water.

She has now twisted her lower back (more hip area) and is only able to move around with the aid of a walking stick. I remember this happened last year and she was in pain for many weeks.

Might she use rhus tox 6c every day for a week then come off for three weeks?

Not sure if she can take rhuta before she starts taking the rhus tox as this might help the sore back/hip more so than rhus tox would?

Your help would be greatly appreciated.

many thanks
Linda