First, please tell me why Ginny is carrying all that stuff. You could lend some assistance you know!
Second, why does she not have a walker?
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I use mine everywhere that I don't use my scooter. Inside the house and outside the house and room to room. It gives great balance support and has a seat that you can sit in comfortably when you run totally out of energy.
I had the muscle jerking and the weakness until my electrolytes were straightened out. In my case it was low calcium but her reason and my reason are majorly different I imagine. Yes, you need to let your Doc know about it and very, very quickly.
Get that Lady a walker. If you can afford Echos to play with I bet you can afford a walker. Even I can fold mine and put it in the back of my car.