Another example of different tricks working for different people. (wacky stuff

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I'm the opposite of Tkrik. Spasms and Tightening are helped by heat with me. I've had to learn the time limits to keep from getting overheated. Guess it's a trial and error to finding the right combo.
As to the numbness, I haven't found anything that can really help with that.

I do know that pushing too hard, getting overheated, getting sick can increase the intensity for me.
If you're having problems feeling the floor, sometimes finding the right pair of shoes helps. I have a merrell shoe I wear on my bad days. The way it's designed helps me with balance and helps me feel that something is under my feet. I also often wear sandals around the house as well.
Hope you feel better soon.