Pressure on the spine can cause numbness of the feet and legs.
I have something like that. I've had numb feet for years. It got so bad that I once stubbed my big toe so hard it split open and I never felt it. Then I read about the diabetes connection and went to the doctors for all kinds of tests. At the end the specialists were going down the wrong path checking for all kinds of things. It cost a lot of money only to find out I have no serious issues other than getting old. That will eventually kill me. Since I had eliminated all the things that could kill me before old age, I started looking on my own elsewhere. To make a long story short, my condition was greatly improved by using an inversion table to reduce the pressure on my spine. Although it didn't completely fix the issue, regular hangings made it more than 90% better. I can feel my feet and toes although there is some reduced feeling in spots. I suspect I have a back problem like a degenerating disc or a bone spur that is helped by hanging. Once that stops working, I will get it checked out by a real doctor. I don't want to go the surgery route until I absolutely need to.