My mother had hip surgery. was doing well. blood clot found and taken care of. now she can no longer walk. leg feels numb.

Let's sort out: Blood clot unlikely to prevent walking now. The leg numbness could well involve peripheral nerve compression, but might wonder if she has had a stroke, or if she might possess problem in lumbar spine such as a stenosis affecting the leg. So, do the variation of possibilities it is quite helpful to now get a skillful neurologist involved.