I'm sorry to hear your sister is having such difficulties. It is hard on you also, because you care so much for her! to you!

It sounds like there is more going on in your sister's body than just MS. I don't really know how open sores on feet are a symptom of PPMS, or any other form of the disease.

This neurologist isn't suggesting she be seen by any other specialist? I've never thought of a neuro for treating open wounds.