Thank you for your reply. I will check out that link and video and also do some research into deficiencies.
My mother's rash is actually more smooth than bumpy. She was using a medicated talc called Cuticura which the doctor had said she should use and which is the one that had no effect. Yesterday we were shopping and she was looking for some more of it, I said I don't think she should persevere with something that has had no effect all these months. She wanted some talc however so I pointed out some baby talcum powder which had added lavender and camomile. She bought that and this morning she said the rash isn't red anymore. Its the first time it hasn't been red. Strange. The skin looks a little dry.
I'll do some research and hopefully find the cause and cure.
Thank you again for your reply and advice. I appreciate it greatly.
Take care :)