my mother is 85 and in weak condition,when she stands up it feals like she is sdanding on pillows?

Answer 1

The feeling comes from the muscles having no strength. I hope she uses a walker, which I would assume she does. The best thing to help her is getting a foot Massage. This would help the circulation and the muscles. Perhaps you can do this yourself using an analgesic cream.

Answer 2

Is she diabetic? If so it could be neuropathy. "Standing on pillows", pins and needles, etc. are symptoms of neuropathy. Have her checked out by her primary care doctor.