Hi @kymc and welcome to Mayo Clinic Connect. I don't want to assume a condition in your mother, but I did want to share some information about Cauda Equina Syndrome which her symptoms are quite similar.

Here on Connect: Cauda Equina Syndrome: Pain, symptoms, management & prognosis: https://connect.mayoclinic.org/discussion/cauda-equina/

Here on Connect: Cauda equina syndrome (CES): https://connect.mayoclinic.org/discussion/my-story-in-short/

"Numbness around the urinary tract, perineum, buttocks and anus are all symptoms of cauda equina syndrome."
It's Numb When I Go to the Toilet: https://www.caudaequinasolicitors.co.uk/medical-negligence-claims/its-numb-when-i-go-to-the-toilet/

I think addressing one thing at a time might be a good start. Has she seen a doctor about the numbness?